Appauling customer service

I have since November 2015 been trying to sort out an overbilling problem with Telkom Mobile.<br> <br> After logging a case in November it was eventually attended to about a month later. I made the necessary payment to cover my account which was not picked up by them. They then kept the outstanding amount on my account. <br> <br> In January 2016 my account was suspended and they have still not taken off other amounts that were overbilled. While suspended they couldn't even phone me to resolve the problem because I couldn't receive calls. My one device has again been cut off without any warning even after logging a third case with the billing dept.<br> <br> How long can it take to resolve a small problem? The staff there don't care about customer service nor can they do basic mathematics which is all it would take to see I have paid what I needed to and don't have the outstanding balance that Telkom Mobile claims I do.<br> <br> Totally pathetic...How do I get out of my new contract? The service stinks.