Unsolicited phone contract

I am currently on a Closer 2 package(10yrs). Around October/November 2014 I was contacted by a call centre agent. She already had my details regarding my current plan package with Telkom and that is the only reason I stayed on the call.She knew what package I was on and also advised me that my premium will be reduced.Well, it's a no-brainer! Who wouldn't want to pay less for more benefits? Under this 'new structure', I would pay less for more data, get a wider range and so on. It was only under these advantages that I agreed to this.I am stunned to learn that I have been signed up to a new 36 months contract! The first premium was more than what I am currently paying on the Closer 2 package! There is no way I can run 2 bills, for exactly the same service, in one household, with only 2 adults. I don't own a hotel yet! I have contacted TelkomMobile countless times, have been to your office almost every week(read-time and petrol) and have sent emails but there is no response from anyone!I spoke to Sihle(supervisor) on the 23/01/15, he promised all will be solved by 2weeks,its 4 WEEKS now!To say that their service is appalling is an understatement. TelkomMobile just doesn't care