OVO energy took over from my previous supply SSE and have since been an absolute nightmare. Sending non itemised bills for one amount, just to tell me it's actually £200 more when I enquire. Talking to me as though I'm stupid when I question the difference. Sending so called care experts to my house without an appointment and charging me £36 for it. They have no care. If you are thinking of joining or if your energy company goes into partnership, run as they are the worst energy company I have had to use since British gas. Their only aim is to get your money no matter what. Fit a smart meter then tell you they need to read the meter even though the smart meter is accurate to them. Avoid avoid avoid