Worst experience after loan settled

The worst customer service. Paid R25000 into the loan account by error on 25/01/2021 after closure of loan account on 16/01/2021. Despite various e mails, phone calls to customer service centre acting clearly on a pre-read script and a legal letter Directxis maintain account is closed and they do not owe me money. No investigation and clearly no ethical business practice.So what happened to my R25000 you fail to acknowledge despite proof of payment. It was paid in error and all I request is acknowledgement and repayment. Account was settled early and all confirmed when a amount was transferred in error after closing of account.

Payment reference was account number.