Bad service and no communication

Bought a silver honda cbr 600 rr through finance with Standard Bank Vehicle and Asset Finance. Paid my bills every month and been doing so for the last few years. Decided to settle the amount that was outstanding, minus the monthly amount cause it was set as a debit order. The amount paid and the monthly debit equaled to more than the settlement amount. Requested that the bank check for me if all was ok as in settled but they said i still need to pay around 1100 which made no sence as i paid 100 more than the given amount. Spoke to the customer care and the senior person there and it was said i need only pay the shortfall amount of 63.79 which i did twice to make sure they get it. A week later i request that they check again as i would like to receive the papers of the bike and once again i am told it is not settled and that i now still ow them almost 1000. I have sent the bank proof of the settlement letters and the one with regards to the shortfall amount. I feel i am being ********** and ******. Dont feel happy about the service and dont think i will ever want anything to do with Standard Bank ever again. Not after this issue i am having