Llythyr i gwyno am ôl-fil ynni

Mae'r cyngor hwn yn berthnasol i Cymru. Gweler cyngor ar gyfer Gweler cyngor ar gyfer Lloegr, Gweler cyngor ar gyfer Gogledd Iwerddon, Gweler cyngor ar gyfer Yr Alban

Os nad ydych chi wedi cael bil ynni ers dros flwyddyn, mae’n rhaid i’ch cyflenwr ddilyn rheolau penodol ynglŷn â'r cyfnod y gallent eich bilio amdano.

Yn gyntaf, dylech ddarllen ein canllawiau os nad ydych chi wedi cael bil ers peth amser.

Os yw eich cyflenwyr yn rhoi bil sy’n uwch nag y dylai fod i chi, gallwch ddefnyddio’r llythyr enghreifftiol hwn i’ch helpu chi i ysgrifennu cwyn. 

Os oes angen cyngor ac arweiniad manylach arnoch chi,  cysylltwch â llinell gymorth Cyngor ar Bopeth.

Sam Hoolin

8 Park Avenue
Arlton
AL1 4CA

sam123@mail.com

01632 960001

British Power

24 Station Road
Giltham
GT16 3LP

24 Awst 2025

Type of supply: Dual fuel

Account number: A632145

Reference number: JH556612

To whom it may concern,

Re: Back-billing complaint

I am writing about a problem with how my account has been billed. This problem falls under Ofgem's back-billing rules.

I have still not received my first bill at this address, despite contacting you several times to ask for one. I requested a bill on 3 April, 10 May and 7 June and moved into my new home on 10 March. I have spoken to you on the phone on several occasions and you have not issued a bill. I provided meter readings on the day I moved into the property and each time I spoke to you. I am unhappy with the level of customer service you have given me.

The Ofgem back-billing rules say I should only have to pay for 1 year’s energy use if I haven’t received an accurate bill for over a year. Please make sure that the Ofgem back-billing rules are applied to the balance on the account.

Please explain why you haven't issued a bill and what you are able to do about the poor level of customer care I’ve received.

Please respond to my complaint in writing within 10 working days. If you fail to respond in this time, I will consider taking the matter further.

Thank you.

Yours faithfully,

Sam Hoolin

Help us improve our website

Take 3 minutes to tell us if you found what you needed on our website. Your feedback will help us give millions of people the information they need.