No Calls No Help

My fianc? is unable to make any calls form his MTN phone since November 2014. We have reported this numerous times since then. We even complained on Hello Peter before but still no feedback and/or solution. At first they made us do several SIM swops and referred us to the technical department. They adjusted countless settings on his handset only to find that the problem lies with the SIM card. We struggled to get a hold of the call centre for days at a time, only to be transferred to another department/get cut-off or given empty promises. We have consulted staff at three different MTN shops in our town. They all suggest a SIM swop, then they call the tech department and then they promise that the phone will be working within the next couple of hours, we just need to reset and remove the battery. Needless to say, this did not work, he is still unable to make any calls but he continues to pay every month. The lack of service and assistance is unacceptable. I can not believe that a problem that was reported so many times still remains unsolved. They did not even offer another phone/SIM or number to accommodate him in the mean time. Just shows, they DON'T CARE about service!!