When we moved into our current house in Sept 2017 we joined Ovo and our first gas meter reading was 12611. In March 2022 our gas meter reading was 18449. Six months later I sent a new reading which was 18770. Ovo then sent me a bill for September based on an "estimated" opening reading of 8944 and an actual closing reading of 18770, claiming that in that one month we had therefore used 108,863 kwh of gas and therefore owed them £8,150. I emailed them the previous bills and meter readings recorded by them on my on-line account, these clearly showed the actual meter readings I refer to above. No response to the queries raised, only a request that I send them another photo of the meter. In response to the photo I duly sent (again) I received a request from someone else at Ovo for a picture of the meter. This cycle was repeated four times with the same request from four different operatives at Ovo, none of whom then emailed back to explain what they would then be doing to follow this up. I called and on each occasion the Ovo representative was unable to understand that billing me on the basis of an "estimated" opening reading that was far lower than any reading taken since we moved in could not be correct. On each occasion the representative couldn't find a record of the emails sent by me using their portal, or previous phone calls I had made to try to resolve the issue. I was put on hold for long periods of time and then cut off by Ovo on two occasions. I have however had several emails from Ovo urging me to both settle my "debt" with them and to increase my monthly DD to over £700 per month. I have complained but received no response. This issue has been caused by an error which is completely, and demonstrably, down to Ovo. Yet it is impossible to get them to resolve this. All they have to do is look at their own records which I have actually sent them copies of. The lack of accountability or care on their part is deplorable. Having read other posts here I realise that such incompetence is a common experience amongst their customers. I will be pursuing my issue via the Ombudsman. The evident reluctance of this company to address what is clearly a clerical error on their part makes me feel as if they are intentionally trying to steal from us. Don't open an account with them. If anything goes wrong you will find yourself without any help whatsoever. They do not care.