I was moved over from SSE and was told nothing would change in that i would stay quarterly pay on receipt of bill. But Ovo bills its customers monthly and i kept being told to read my meter. monthly and pay monthly So it took a while and a few calls but finally i was billed for 3 monthly wth the emails telling me how much i owed and thats what i paid This happened twice and then in december 2022 i received the expected e mail that my bill was out and i owed only £100 .It was very low but why would i question it. So i logged in to ovo and went to bill pay and paid the £100. Then march 2023 got the email.with how much my bill was went to bill pay and paid it. and up popped the message i needed to pay more. - went to this 'dashboard and found i was over a grand in debt. Tracked back and found when i paid the £100 as i was told to there was nearly £500 left outstanding .Over the next few weeks I emailed ovo 3 times asking what went wrong and i needed help here-hoping i could pay it off .over a few months never got a reply. to the fist , got a we are looking at it for the second and nothing from the third As i have great credit and didnt want to lose it it i paid £500 in Apri and £350 in may from the money i had put aside for my taxes. Called up and told CS. Called a second time and talked to complaint-they said its policy if a customer doesn't settle a bill in couple weeks after its issued to contact them-and no one knows why no one called me ! i got a written apology , nothing about why policy wasnt followed( even though i am regarded as very vulnerable customer 73 with multiple physical disabilities and am bi-polar ) and told that my feedback on the unanswered emails would be 'passed along'.( i would have thought it important enough issue to do more then 'pass al) and . Because i gave them £850 tax money i've had to put off filing my taxes. Kicker is the reply reminded me that 'Ovo is there for me'