Falsely handed over

My fiance had 3 loans with Capitec, which were handed over. So last year all his loans were paid up on the 5th November 2022. We received a clearance certificate and we have POP of all paid up loans. This year which is 2023 when we tried to apply for a car it reflected that he still owed Capitec. He also received a call from lawyers saying that he was owing capitec and the account was handed over to them on the 09th January 2023 the lawyers were from a company called MBD attorneys. So 1st question was how is it that we pay up in November and be handed over in January for an account that is paid up? Capitec can not give us any answers but the account shows R0.00 on their side we have asked they speak with their lawyers to remove his name but unfortunately we are not getting any assistance.