Cancellation of contract

Hello Peter

I have a problem with Telkom I app**** for an LTE route in October with Telkom and they delivered it on the 5th of Dec, but it's not the agreed upon deal now I wanna cancel the contract but they giving me a run around I have to hold for 20min to speak to an agent then they transfer me to another department, I went to one of their branches today and I'm told that branches don't deal with cancellation, and I must get hold of the agent I first app**** with and his numbers are off.