CellC poor service

I signed up for a contract when I received a call from an agent in Cape Town about 3 months ago. She offered a new contract to me at the rate of R199-00 per month. I informed her that I do not want to continue with my CellC contract as I am not satisfied with their services, she however promised that should I have a problem CellC will immediately attend to the me. I now received messages that my contract is in fact R238 per month on phoning the 084 135 and 084 145 numbers the call centre agents cannot assist and the last person I spoke to was so rude and I still have not been attended to. I think this service is disgusting to say the least and I want a senior manager to contact me in respect of the contract .I want to add that I was placed on hold for 20 minutes.