Bad service received ever

I called cell c on August to cancel my contract. The consultant transfered me to cancellation department. We they told me my contract end on the 10 of October. Advise them the to concel as I dont want any contract with them anymore. She then advise its cancelled. Now I got an SMS states that I need to pay R211 for what because I cancelled everything with Cell c. I then called on Thursday at night the consultant advise that I need to call cancellation the following day. I called in today assisted by Rosy she told me that she cannot trace my call that I made in August and they will deduct money for my account for the benefits. I do not want any damn benefits from Cell c want this contract cancelled as I requested in August. I want this sorted out. I have been a loyal consumer for 2 years. Do not you dare deduct any money for my account.