Standard Bank mistake.

I settled a Standard Bank Edgars/Jet MasterCard amount in July 2013. I received a settlement letter & was assured that the card was closed & the matter was resolved. I recently received a number of calls from an attorneys firm named Bham & Dahya to advise that I have been handed over for an outstanding amount on the above mentioned card & that I need to make payment immediately. I have sent a formal complaint more than 20 working days ago to both companies asking for the matter to be resolved. Still no response from either of them. <br> <br> I have the settlement letter as proof & sent this to both companies too. I would like this matter to be resolved & want written proof as well as assurance that I will not be hounded by debt collectors in this regard again. If this amount that I settled shows on the credit bureau, I would like that removed as well please. <br> <br> Kind regards, <br> Lee-Anne