I received a letter on 17 November saying my a/c no. was changing but did not mention any other changes or wld be sending me a bill for 2 months when my contract with them is to receive qtrly bills. Also did not mention they would need meter readings. The bill was an estimated bill, and way overestimated. Have checked online and a B.Gas article says they have been planning this change of accounting system since 2021 and not to worry there would be no changes. But they have changed things and are in breach of contract. I do not have to accept an estimated bill. When I complained, this arrogant person in the executive dept phoned me and said he was closing my complaint and twice refused to send me a deadlock letter so I could take my case to the ombudsman. They do not comply with their own complaints procedure either. Why is this awful company with such arrogant staff still allowed to operate as a business.