Why Effective Complaints Matter

When something goes wrong with your energy supply—whether it’s an incorrect bill, poor customer service, or unresolved issues—knowing how to complain effectively can make all the difference. A well-structured complaint doesn’t just air your grievances; it creates a documented record that forces your supplier to investigate and resolve the problem. The energy industry in the UK is regulated by Ofgem, which means your supplier has legal obligations to respond to complaints within specific timeframes.

Many households accept poor service without realising they have rights. If you’re unhappy with how your energy supplier has treated you or managed your account, you deserve to be heard. This guide walks you through the process of making a complaint that actually gets results.

Gather Your Evidence First

Before you lodge a formal complaint, collect all relevant documentation. This might include:

• Your energy bills and statements
• Copies of letters or emails from your supplier
• Records of phone calls (dates, times, and what was discussed)
• Meter readings you’ve submitted
• Any compensation or credits already offered
• Photographs of faulty equipment or meter issues

Having this documentation ready strengthens your complaint significantly. If you’re complaining about billing errors, for example, show your actual consumption patterns. If it’s about customer service, mention specific dates and names of staff members you’ve spoken to. This evidence demonstrates you’re serious and makes it harder for your supplier to dismiss your complaint.

Contact Your Supplier’s Complaints Department

The first step is always to contact your energy supplier directly. Most major suppliers—British Gas, EDF, Octopus, OVO, and others—have dedicated complaints departments. Don’t just ring the general customer service line; specifically ask to lodge a formal complaint.

Put your complaint in writing via email or post rather than relying on phone calls alone. Written complaints create a paper trail and are taken more seriously. Use clear, factual language and avoid emotional language or aggression. Explain what went wrong, when it happened, what impact it’s had on you, and what you want as a resolution (whether that’s a refund, credit to your account, or simply correcting an error).

Your supplier must acknowledge your complaint within three working days. They then have eight weeks to investigate and respond fully. During this time, they should keep you updated on their progress if the issue is complex.

Know What Constitutes a Valid Complaint

Ofgem recognises complaints about various issues, including:

• Incorrect billing or charges
• Failure to read meters accurately
• Poor customer service
• Misleading information about tariffs or switching
• Failure to provide required documents
• Unreasonable payment arrangements
• Issues with direct debit payments
• Complaints about disconnection or supply problems

Some issues fall outside the complaints process. For instance, if you simply disagree with your energy rates on a tariff you knowingly signed up to, that’s not typically a valid complaint. However, if you were misled about those rates or weren’t given the right information when switching, that is valid.

Use Ofgem’s Free Ombudsman Service

If your supplier fails to resolve your complaint within eight weeks, or if you’re unhappy with their response, you can escalate to the Energy Ombudsman. This service is completely free for consumers and is the official independent dispute resolution service for energy complaints in Great Britain.

To use the Ombudsman, you’ll need:

• Your complaint reference number from your supplier
• Details of your complaint and the supplier’s response
• Evidence supporting your case
• Your customer account number

The Ombudsman has the power to order your supplier to pay compensation of up to £900 per complaint (or £1,800 if you can demonstrate financial loss). Their decisions are binding on suppliers, meaning your energy company must comply.

Keep Detailed Records Throughout

Document everything during the complaints process. Note dates you contacted your supplier, reference numbers provided, names of staff members you’ve spoken to, and summaries of conversations. If you receive letters or emails, file them systematically.

This record-keeping is crucial if your complaint escalates to the Ombudsman. They’ll want to see evidence of your attempts to resolve the issue with your supplier first, and a timeline of what happened.

Be Clear About Your Resolution Request

Don’t just complain for the sake of it; explain what would resolve the situation. Are you seeking:

• A refund for overcharges?
• Compensation for inconvenience?
• Correction of billing errors?
• Fixing a meter problem?
• Removal of a debt you dispute?

Being specific helps your supplier understand exactly what you want and makes it easier to determine whether the complaint has been resolved. If compensation is appropriate, the Ombudsman has guidelines on what’s reasonable based on the severity and duration of the problem.

Follow Up Persistently

If your supplier doesn’t respond within eight weeks, don’t wait passively. Contact them to ask for an update. If they claim they’ve already responded but you haven’t received anything, request they resend it. Keep evidence of these follow-up contacts.

If you still haven’t received a satisfactory response after eight weeks, you have the right to escalate to the Ombudsman immediately. You don’t have to wait for your supplier to drag their feet.

Take Action Today

Don’t accept poor service from your energy supplier any longer. If you’ve experienced billing errors, unfair charges, or inadequate customer service, you have the right to complain and seek redress. Start by gathering your evidence, contacting your supplier’s complaints department with a clear, written complaint, and follow the escalation process if needed.

Remember, the energy companies rely on many customers not bothering to complain. By doing so effectively, you’re not only protecting your own interests but also helping hold these companies accountable. Visit the Energy Ombudsman website today to understand your rights fully, or contact your supplier now if you’ve been meaning to raise an issue. Your wallet—and peace of mind—will thank you.