In line with each and every review on this site, mine would also be a minus star if it was at all possible. I have been with Avanti for 33 years. In December 2023 our gas top-up was not provided and we ran out of gas over Christmas - no heating, hot water or gas to cook. Avanti told me they were replacing our tank so had run the gas down in preparation yet they did not warn me of this. I am in my late 70's, disabled, with breathing difficulties. I asked if the tank could be replaced at a more sensible time of the year to which they agreed. They arranged a small top-up and said a date would be advised in Spring. (Needless to say Avanti were not in the least bit bothered by my complaint that I had been left without gas for 10 days in the middle of winter). I telephoned Avanti in March and they had no record of the tank needing to be replaced!! Ineptitude at its finest. When the engineers arrived to take the tank away two weeks ago, they informed me that the site was not suitable i.e the paving slabs on which Avanti had placed the tank were no longer a suitable and according to the engineer the tank safety certificate had expired 4 years earlier - yet they continued with deliveries. They told me I would be without gas until a concrete base had been put down, I have had quotes of £800 - £1,200. I am a pensioner with few savings and I have been without gas for 11 days. Avanti have said I'm in contract until August which means Calor can't help. Avanti will not answer my complaint and have washed their hands of the matter.