I just gave my first meter reading and the meter serial number at the top of the page does not match the one on my meter.
I am switching from npower because of bogus meter issues.
They tried to fit a smart meter last year but the engineer left my old one in because he was unable to get a signal.
They kept deciding I had one and were under billing me for it.
This was resolved by them 3 times but became unresolved again recently which was the final straw.
I do hope they are not passing on this issue to you.
Also you don’t seem to have any way to speak to someone about this.