Ovo and sse has been the most stressful experience and after 8 months of asking to switch from a inherited pre payment meter to a monthly and constantly promised but has not happened until now, I've moved my electric to octupus (far better) but ovo has blocked the gas. I was sent an email saying I owed nothing. Then sent a bill of £36 and then sent a bill of £2750 with no breakdown of costs or how many units used and the cost of units. I've been call a liar by sse because they had not switched me over but their call centre person said they had. I'd spent more than 30 hours on the phone trying to sort it out. The ombudsman said it was sorted when it clearly wasn't as they took sse on their word and not the evidence supplied. This is only part of it but now I have a charity working on my behalf yo help as there is no resolution and no response from emails. My last contact with them consisted of them giving me different reasons for the charge of £2750 followed by them getting back to me. Three weeks later, still no response from them. The stress has been ongoing and furthered my depression. What they are doing should be illegal. Its mental torture on customers with many people paying due to fear even though no proof of units used or cost is given.