Credit limit reduced to R1 after retrenchment but still racking up fees, non-closure of account

I'd been retrenched in 2017 and used my Mr Price credit life protection to settle my account. After settlement my credit limit was reduced to R1 and I'd requested for the account to be closed as I could not use an account with a R1 credit limit. The account was never closed, however, and Mr. Price keeps adding account and insurance fees to my account, so although I owed nothing when requesting for account closure I keep getting bills for account and insurance charges. Since I'd requested for the account to be closed, the accounting and insurance charges are not my responsibility and I am not liable for payment.