Bad service

I took out a new unlimited contract with telkom its only three weeks now, the phone i recieved was an iphone6, my problem is the coverage is terrible. I ported my num from Vodacom to telkom i was with vodacom for 10 years never had problems with reception. Now i am using telkom i cannot make voicecalls without the calls being disconnected or not getting through and the people I do call 90% of the time cannot hear me if they do hear me its because I am moving around the house trying to get reception. My phone always ever only shows two bars of the five bars of reception thats if i get to an area where it does pick up reception but generally its on permanant gprs or edge. 3g as they refer to it is basically never seen while im at home. Now what is the point of having unlimited contract when calls are impossible forget internet usage because there is no reception. Is Telkom offering these contracts at R1700.00 per month and sabotaging the network so we cannot use it because I cannot see any other explanation. Either my reception problem is sorted out or they cancel this contract and take back the phone or I am going to report this problem to the consumer protection guys.