Misleading sales contract,MTN

I recently upgraded my mtn contract with Rewards co..The sales agent offered a contract ,that was acceptable to me. However when it was activated ,I did not receive the agreed package. I was also told that the billing on my new contract will commence on the 01st of December, and that was not what transpired..I am trying to clarify the terms of this contract as from the 14th of November, the day the upgrade was done, and I have received no feedback as yet. I called the company and have sent numerous emails,but they simply do not respond with any resolution. They have stated on many occasions that an agent will call ,but that does not happen. I have visited the Mtn customer walk in centre at the pavilion shopping mall in Durban and was informed that I have to.query my complaint with Rewards co as they have no access to the contract taken. This is unacceptable and frustrating to know that these companies get away with misleading sales tactics and selling contracts that are not true. I will never entertain or enter into any contract telephonically again..I am hoping that I can get some assistance on the way forward. This is once again the level of *******ion that ,the general public must be subjected to . Truly unfair and upset.