Poor service

I have been having problems with my fleet fuel card. A filling station accidently entered incorrect odometer reading. I was not notified by the bank. Next time filling up feul my card was declined. After communicating with the bank I was told to call the cal centre at next fill up. I did this just to be told there is nobody that can override and authorise. In the meantime my card is still being declined. This is the worst service from such a large institution.