Poor service from Cell C

I upgraded telephonically from a Pinnacle one contract to a Pinnacle 2 contract. All my call time was cancelled aproximately 600min. The sales lady did not notify me that all the call time will be cancelled. I have phoned Cell C several times and get the same answer, that they will escalate the problem to the correct department. Three people from Cell C has phoned me and they said they will escalate the problem to the correct department. This is just a run around. Iam totally dissatisfied with there service. I want a total money refund or cancellation of the contract. I hope this can be resolved.