4 Month Struggle with no Feedback or Result?!

I contacted Cell C on 2 October 2015 to enquire about my tariffs going up from R99.00 p/m to R270.00 p/m. This spike went on for a few months. I called in and was told that my contract expired 4 months ago and that my \special price"falls away as a result. I then cancelled the contract however I am yet to receive a refund for the excess money taken during this period. The contract states that Cell C must inform the customer of any changes to take place during this agreement. I have not been contacted in any way and have not agreed to pay R270.00 per month. Read 4.2/4.2.2. Busi"