Absa vehicle finance lists you on itc even though you owe them nothing

Traded in my car on a new car and the absa settlement amount was paid by the dealer! I collected my new car and two weeks later I get an email I owe absa money!! There was a outstanding amount of R3800! I phoned and asked how can that be? Absa gave the settlement amount and the exact amount was paid! Few days later absa tells me sir all is sorted and don't have to worry account is paid up and closed! Guess what today I learn I was listed on itc for missed payment ? What missed payment???? Never skipped any instalment ever!!! Now absa tells me they will remove all from itc seeing absa was wrong and my case should never had gone to collections or legal department! How can you list a client on itc for missed payments?? How can absa list a client on itc if the car was settled and there is no outstanding amount?? Very unhappy for absa doing this to me! I have phoned and asked a few times are you sure all will be sorted and I will not be listed exct? I even offered to pay the money absa said I still owe and absa can refund me if all is sorted and absa said no sir dont pay you don't owe anything!! How can you do this to a client???