Loan settled

FNB settled the loan on my behalf. The contract I signed with FNB is the only proof of payment I have. The money reflects on my account – surely you can see that on your system seeing as you are part of FNB! Two debit orders have been deducted from my account even though the account was settled in full on 23 March 2022. I want the interest charged reversed and credited. I explained all this to your representative via telephone. I expect this matter to be resolved ASAP. Very unhappy about this poor service.