RCS are *******

I have a makro account card with RCS, it is the worst mistake a person can make, i decided to settle my account, this is proving to be an impossible task, firslty requesting a settlement letter takes 5 attempts, i eventuall was assisted with a settlement letter, i made the transfer of the reflected amount, a wee later i receive another settlement letter, the account is not being used as i intend on closing it so I am not sure where the different amounts come from, i contact the call centre and i am told by thr agent not to worry about the second settlement letter as long as i paid the amount reflected in the first letter, 2 weeks later i recieve an email informing me that I paid extra and now have a crexit balance and should provide a copy of bank statement for the credit balance of R600 to be transferred back to me, a week later after after the conversation about the credit balance i receive another email stating that i owe them an extra R400 because i short paid them, it is clear to me that RCS accounts department as a whole is ***********. I fail to understand why is it so difficult to settle one's account. This matter has being forwarded to the ombudsman doe review. Try and not deal with RCS, they are unprofessional, rude, extremely *********** and a bunch of *******