Please avoid considering this energy supplier at all costs. My father was charged twice for the same bill (Ovo Energy sent the same bill twice, and threatened to take legal action if he did not pay the same bill twice). Sadly, without double checking he ended up paying it. After contacting their customer service, they promised to provide a refund (a cheque in the post, which never arrived). After contacting them again they decided to credit his Gas and Electricity instead of refunding his money. This has happened on two occasions. We are now considering other other Energy suppliers. My own horrendous experience with OVO Energy included topping up the electricity on my Smart Meter (Pay as you go) Via the OVO Energy app. The money was deducted from my account and unfortunately my Smart Meter never updated the amount I had topped up. I send evidence to OVO Energy including bank statements and confirmation from the bank that a payment was taken from my account to top up my electricity. OVO Energy first refused to provide me with a refund and later stated that the refund is pending with the bank from their end. As a result of all this my Smart meter started using up emergency credit in the end. Until this very day the money has not been refunded. Very disappointed!