RCS - Poor customer service

RCS cannot follow through on queries but are very good at harassing me for payment. My Tekkie Town account card moved over to an RCS credit card a few months ago changed my EFT payment reference number without notification. Every payment I have made thereafter has not been allocated to my account and I am now being charged ridiculous collection fees for SMS's, letters and phone calls. I have made numerous calls to the call centre, sent numerous emails to the payments email address and have had no luck! All I want is to have my payments allocated to my account correctly and have all the collection fees and interest removed and adjusted accordingly. I am tired of wasting my time with call centres and unanswered emails.