Bad service

Worst company ever. I upgraded 2 weeks ago to a router and TV. Received router same week, still waiting for the TV. Vodacom just saying it's not their problem. Another company is handling it. Now correspondse from other company. So now I try to cancel contract. With no luck. They sent me from the one agent to the other and then everytime suddenly the call drop. Why only with vodacom does the call drop. How the hell I going to cancel this contract? What must I do to get help from vodacom?