MTN - Please pay back the money!!!

I don't usually complain that much about service but this is ridiculous. <br> <br> I opened a contract with Nashua Mobile back in 2010. I never had a single problem for +- 5 Years. My contract was with MTN (at Nashua). Nashua the company closed in September/ October 2014. They switched my contract to MTN. Then suddenly in January I was billed for a PACKET SWITCHED DATA CALLS of R722.86???? <br> <br> First of all I tried to phone the FREE customer care number MTN 808 / 083 1 808. They never picked up!!! So much for care. So I went to the MTN Store in Fleurdal Mall. They agreed I was billed wrongfully since I paid a fixed amount for 5years now. They logged a call for my credit (in January). They never called back. I went back to the store only for the other lady to tell me I must phone the 808/ *** number. I said I already did. She then said I must do it again. Who on earth can help me then if the customer care number is not working and the customer service is so pathetic??? <br> <br> I was billed R722.86 more than usual?? I want my credit back on my account!!! and I see I am not the only one complaining about the free number & about a PACKET SWITCHED DATA CALLS billing???<br> <br> Pay back my money please!!!