Best answer by ITGeek123
If I have made a mistake I normally just re-submit my meter readings, maybe the day after, you should be able to do this online through your account. From what memory serves. I believe OVO use the latest meter readings to bill you. I may be mistaken, but that is what my brain is telling me. If re-entering them online doesn't work, or if you are worried, call OVO customer support: 0330 303 5063
Please let me know how you get on.