Worst energy supplier ever! Couldn’t pay any bills for 5 months due to their merger with SSE. Ombudsman failed to help me but agreed OVO were out of order. I was Billed for incorrect payments they notified me only after 9 months then demanded full amount. I’m £600 in debt due to on going multi meter scam. They still went by estimates even after submitted meter readings. They have the Most expensive 3 tier tariff system. Rip off bills & poor customer service. Their own engineer failed to read meter correctly. Worst energy supplier ever. All within one year. Stay clear. Greedy idiots. I’ve never been so depressed in my life! Try everyone but OVO.