After continual battles after the switch from sse. Ovo kept upping my electric monthly DD. (No gas supply) I have no central heating (log burner) in my four roomed terrace house. It went up based on thier continued estimated bill , which was positioned below my actual meter reading sent to them . At one stage they wanted £123 a month . Despite my actual calculated bills even during winter bieng no more £60. I switched suppliers recently ,and on my Ovo account under the correct final reading is an 'estimated ' usage and the final bill is calculated on that estimate , not the actual meter reading ? As the final bill process has been advised to be at least 4-6 weeks, I'm anticipating more estimated bills (and possibly daily standing charge )piling up and that bill being based on a higher estimate. ! .despite they stopped supplying me 2 days before this latest estimate. I've rung them twice and have been told the bill showing has been recalculated on actual final meter reading and my Ovo on line account will reflect this now . As of today it still hasn't changed and the daily tariff until next billing period is still counting down ?. So I will log in again tomorrow and every day and download each daily increase/alteration until the account is closed (if I live that long !) I'm preparing for a battle as if this happens my current credit held (which at todays balance would be a refund )will spiral into debit , for electric , I'm now paying another supplier for !