WHAT NON SENSE

My account has been under debt review. My account was paid up a year ago. Now I have balances of R25 to pay what non sense is that. I have paid the settlement amount on Monday 13/08/2018. When I called to close the account today, now I still have a balance which I’m not going to pay because this account was paid up last year. Why am I still paying. When I called on Tuesday to check if payment was received I was told that I had a death policy so I cancelled it and I was told I don’t have a balance. And I have sent the paid up letter. And this account is still open