Debit still taken after account was paid in full

My account with HiFi Corporation, which was handed over to your debt collection company, ADRS.

At the time, my account was in arrears and I entered into a payment arrangement with ADRS. I honoured the agreement in full and ensured that all required payments were made as arranged.

Upon requesting a statement of account, I noted that my account reflected a credit balance of R490. However, after this credit appeared, a further amount of R500 was debited from my account. I subsequently received a paid-up letter confirming that the account has been settled. To date, I have not received any feedback regarding the refund of the overpayment.

I fulfilled my obligation by settling the account as agreed, and I now request that the same level of accountability be shown in resolving the outstanding refund due to me.