Gross incompetence and indifference shown by RCS

I have been fighting with members of your staff for more than 2 months already. My account should have been settled up but someone reversed a cash payment of R6350 and reposted it as R3350, because of this I am expected to pay until someone at RCS gets their act together and sorts out my account. I have spoken to multiple people about this and get assured the matter will be looked at and they have made notes on my account about the issues but no one ever calls back. After being assured that everything has been submitted and my account will be rectified, 2 weeks later no one from RCS will answer me about my account but they have the audacity to call me requesting for payment. I am sick and tired of the gross incompetence and indifference shown repeatedly by RCS. This needs to be sorted out immediately!