Charged fees Instead of Issued a Settlement Letter

I am looking at my September statement it says while making a final payment of R170.25 it seems I had paid double. The account has credit of R170.25. You would think this means a refund and a settlement letter. No not Edgars! Edgars charged me .95cents Interest on an account not owing credit. I do not know who their account is but if your calculator says .95 cent is the total of 17% of -170.25... anything below zero in a credit facility means zero!!! No interest!!!! You owe me money!!! I don't even want the money but simply want you to follow the law and issue a settlement letter. No Edgars is charging service fees for something that is not there. I understand the situation Edgars is under but hope it refrains from conducting itself in an ********* manner. Please close my account.