Pathetic service from Call Center and Admin dept

I have an account with Makro and I paid R2000.00 the end of March 2015 and requested a decrease of my credit limit for that amount. I followed through with all the requirements and was told that my request was going to be completed. A few days later I was informed that the requested amount would not be possible but R1800.00 due to fees which I accepted and advised them to proceed with it. On my next invoice date I discovered that nothing was done on my account. I called in and was informed by the Call Center Agent that she could see the request noted on my profile but Admin dept had failed to complete it. I was transferred to Admin, the above lady was rude and said that there is nothing that she can do and that I can only get my credit decreased by R1200 which is R800 less than my original request. I then inquired about R600 that was (MISSING) as I was informed that about the decrease of R1800.OO previously. She tried to sell me the same story that it was fees,so I advised her that I SHOULD NOT PAY FOR FEES DUE TO NEGLIGENCE WITHIN THEIR DEPARTMENT! I was given attitude and then requested a supervisor or manager call me back and still no call.I PAID R3000 8/7/2015 AND SAME RESULT