Zero stars, estimated bills were 100% more than the energy I was using. They racked up debit without any concern or contact. Spring an "We're increasing your direct debit from £40-£250/m" When attempting to find out why I owed them £3K (Single person, just electrcity, one bedroom flat for 1 year) I had a multiple month battle. They used the excuse they changed the billing system and were charging me on both. This answer took months of talking to their inept customer services reps, most none native English speakers that did not understand what I was saying. No one I spoke to seemed to understand how that charge was simply impossible. (Equivalent to a family of 5 Gas and Electric). Ombudsman had to step in eventually and I was still left with £1k of debit that wasn't correct. Eventually payed it and moved away. Terrible, crooked, thieves of a company. I can not overstate how awful this experience and their company was. DO NOT USE BRITISH GAS. How did you communicate with the company? Email, phone and Live chat.