Telkom Tactics, they never respond.

A few months ago I took out a mobile contract with Telkom. From the very first week, some of my contacts were struggling to get hold of me. I have reported this to the local branch and this complaint was logged onto the system. Telkom head office then started contacting me every second week, asking me whether the problem has been resolved. Every time, I told the consultant that I was still having problems and that certain people cant phone me. After months of still battling, a consultant phoned me again and I asked whether they can just cancel my contract. I was put on hold for so long that I had to put down the phone. The same happened two weeks later. Certainly Telkom tactics! Last Saturday, I went to our local Telkom branch and informed them of what had happened and that I would like to terminate my contract. I asked them to come back to me the following week. They also ignored me and only came back to me once I sent them an email. It was also mentioned to me that the contract can't be cancelled without me paying a cancellation fee. This is ridiculous, since if I was informed before signing a contract that I would only have limited coverage, I surely wouldn't have continued.