I would give no stars, but that isn't allowed so have to give one. Terrible company. Overwrite historical bills, add fictional debits and debts to people's accounts. Over bill, constantly increase DD payments. Allow customers to get £4500 in credit, but if they manage to get OVO to eventually give that back they start messaging with your account and add fictional debts. Then if you are a few hundred in debit in the winter massively increase the DD. Lie to the Ombudsman and state you have been £2k in debt to them when they went back three years and added a fictional adjustment debt that wasn't there previously. Then because you have the previous evidence and several bills all generated at different times for the same closed periods but clearly showing they have been tampered with by OVO they say oh it was an SSE migration issue. Then both the customer and Ombudsman have to point out that they were never with SSE and always only with OVO. You win two Ombudsman cases and go through hell when they are already aware you are a cancer patient and eventually leave them with the Ombudsman admitting that they have made such a mess of your account at OVO and do not have a sufficient audit trail that it is impossible to unpick so even they say it's better to cut your losses rather than experience any further stress. Well, worst energy company I have ever had the misfortune of dealing with. It was an original error in OVO new system in 2020 which led to only the day reading being able to be input for electricity. They took this as the night reading then the right reading as the day reading making it look like we had clocked the meter round. We hadn't. They have read our meter once in 8 years the week or two after we moved in. This is against their legal obligation. Tried to put us on prepayment meter because of a debt we never owed which they maliciously added to our account when I escalated our complaint to the Ombudsman and had to be reminded they can't do that as the debt (which didn't even exist) went back over 3 years and my husband has medical equipment he relies on which has to use electricity which they have been aware of since we moved in. They even tried to remove the vulnerable customer flag on our account.