Paid-up letters for Accounts

Myself and the my debt Councillor have been struggling for more than two weeks to get a response from ABSA regarding paid-up letters w.r.t. my cheque and credit card accounts. We have phoned numerous times to both departments and then get told the request has been registered and we will receive feedback within 24 to 72 hours. Nothing happens. I have even now closed my account to see if it would trigger something but to no avail. I honestly do not know what to do more. All my other creditors rep**** to us within two days. Not sure what ABSA's problem is. Amazing how quick they can send statements and letters when you owe them something but now that the accounts are paid up, they ignore you. Extremely disappointing.