Cancelation

I have contacted telkom mobile numerous times to cancel our contract. We have no device so we are paying for the service only. What a horrible ordeal. In December I called to find out what we need to pay if we want to cancel, your call centre couldn't help me. In fact they told me we can't cancel. I then told your consultant to refer to the CPA as I have the fullest right to cancel. They insisted that I email, which I have done, but to no avail. We printed the cancelation papers and faxed it through, I also spoke to one of the managers that said she will back date the cancelation to beginning december. My service has been cut on 15 December as I refused to pay because I still did not know what the cancelation fees was. Now, we received a statement and you are still charging me every month even though we made no use of your service. How can you charge me for a service I have not used??? I am terribly frustrated as you dont seem to care, you try and make it as hard as possible for a client to cancel. I want a manager to call me as your normal call centre agents dont seem to have the capacity to resolve this problem.