Over charged, no refund!!!!!!

On the 15th July 2015, DSTV debited R 2 094.00 from my account which was way more than they should have debited. I called the call center and was assisted by a gentleman named Nkululeko who informed me that I will receive a refund of the overcharged amount of R 882.00 within 5 working days. this did not happen!!! i called again on the 23rd July 2015, and got through to a guy named Linda who told me that the refund was pending and will be deposited to my account within 40 DAYS!!!!!! This was now a different story from what I was told by Nkululeko on the 16th July. I called again today and got put through to a lady named Fortunate and after putting me on hold for about 15 minutes, she returned to tell me that the amount was paid into my account on the 17th July 2015. I found this baffling as when we started the conversation with Fortunate I gave her a ref number (***9-I14) of a call I made on the 23rd after having to wait for over five days from the first call I made on the 16th! I am really disappointed at what has transpired regarding this matter, firstly your agents tell me different stories its like they do not work at the same place! PLEASE FIX THIS!!!!