Harassment from Cell C and SSDA

Cell C please stop harassing me with your contract that expired, your SSDA is harassing me. You retrenched me and I filled the forms that I don't want to continue with the staff line,the line was terminated apparently on the 10th of April but I filled the forms early february,it was not my mistake that you didn't close the account in time.the account was removed from my profile when I logged dispute with credit bureau and I have a proof. Stop harassing me.