Supplier E complaints
Supplier E ranked 6 of 13 suppliers for complaints in 2026 Q2, with 8 complaints per 100 customer accounts. Here’s the data - and the escalation route that actually works if they’re messing you around.
Data last updated: Ofgem 2026 Q2
View source on ofgem.gov.ukRating
8
Lower is better. Rank 6 of 13.
70%
Higher is better - the share of complaints fixed fast.
How to complain about Supplier E (and actually get somewhere)
A common mistake: going to Ofgem. Ofgem regulates the market but doesn’t resolve individual complaints - this is the route that does.
- 1
Complain to Supplier E in writing
Include your account number, what went wrong, and the outcome you want. Writing creates the paper trail you'll need later.
- 2
Give them 8 weeks
Suppliers get 8 weeks to resolve a complaint. If they send a deadlock letter sooner, you can skip ahead.
- 3
Escalate to the Energy Ombudsman - free
After 8 weeks or deadlock, the Energy Ombudsman can make binding decisions worth up to £10,000. It costs you nothing.
Common questions
Can I complain to Ofgem about Supplier E?
Not for individual disputes - Ofgem regulates the energy market but doesn't resolve personal complaints. Complain to Supplier E in writing first. If it's unresolved after 8 weeks (or they send a deadlock letter), escalate to the Energy Ombudsman, which is free and can make binding decisions worth up to £10,000.
Which ombudsman handles Supplier E complaints?
The Energy Ombudsman (Ombudsman Services: Energy) handles Supplier E complaints. It's free for consumers, and you can use it after Supplier E has had 8 weeks to resolve your complaint or has issued a deadlock letter.
How do I complain to Supplier E?
Put your complaint in writing with your account number, what went wrong, and the outcome you want. Keep copies of everything. Supplier E then has 8 weeks to resolve it before you can escalate to the Energy Ombudsman for free.
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Source: Ofgem Retail Market Indicators, 2026 Q2. Published under the Open Government Licence v3.0.