Best answer by Tim_OVO
When I log into my account, the initial meter readings don't match the final meter readings agreed with the previous supplier.
The opening meter readings should match the readings used in your final bill
Make sure they're not by looking at the actual readings shown in the first bill on MyOVO
If there's a difference, reach out to your old supplier and us to confirm the official readings and who's not using them: firstname.lastname@example.org