Inconsiderate process !!

I am a telkom user, was very much impressed with the pricing and package i got from Telkom, but now when it comes to me wanting to cancel my contract u'm getting the run around. i go into the store they cannot help me but yet so eager to tell me that i can upgrade, i call into the call centre, they can't help either, i eventually get the process correctly only for the internet site to tell me that i have to wait for you guys to call me again. and today is the 1st of October and my simcard has been loaded with data and free minutes etc, and i do not want it because that means i will be billed next month again which is wrong !!!! i am extremely and highly frustrated please fix this as i need to sort out my finances !!!!