3 months of complaints and still no results

I have a new contract with TELKOM MOBILE. I called the telkom service centre in the last 3 months maybe 10times regarding my contract that cant phone certain numbers. Just now I had to call my security company because of my Alarm that went off,and I couldnt make a call. Each time I phone the Telkom service centre they answer is that its a fault on their side, they havnt loaded my contract 4500 call minutes for the month. It will be fixed in the next 72hours. THREE MONTHS LATER AND STILL NOTHING, but I still have to pay my contract each month. I cant pay for a service that dont work......its the WORSE service I ever recieved, and if this is not fixed in 24hours time, I will take this matter to court. I am fed up with Telkoms bad service and empty promises