Account settled but still blacklisted

I settled my account on 2016 august 15th and got a call from the attorney's recently on 2017 July on behalf of edcon telling me that I still owe edgars an amount of R98 but when I get to the store to pay that amount I still owe they tell me the account is closed I cannot make the payment we tried to use my ID number and my previous account number that was settled but still I cannot make any payment. Finally they sent me an SMS with the FNB banking details and I paid an amount of R120 bcoz it had interests by 29 Oct 2017 I still have the slips. They attorney's still call me even today telling me I'll be blacklisted.plz help