Stay clear of OVO! I am genuinely experiencing the worst customer service I have ever received. I recently purchased a house, submitted opening meter readings and then regular meter reading after, however OVO decided to use inaccurate estimated reading instead, despite complaining and trying to resolve they ignored me and send threaten bill requests constantly until I paid, still no refund. I then decided to switch because of this bad experience and again instead of using my final meter readings they used estimated meter readings which were inaccurate and too high, they are currently ignoring all of my complaints and continue to send me final bill requests for energy I haven't used!