Cellc ripping customers off

Cellc is trying to rip me off, my contract was supposed to end September and I did call in August to cancel the contract as required, I went to their shop and found out the contract was not canceled and I immediately put another call in September specifically asking the contract to be canceled again and I was told someone authorized the contract to continue, which I refuted and asked for cancelation and was told someone will get in touch with me but nothing till day. October I was debited R200 instead of the R150 I pay monthly and I thought I was paying for cancelation of some sort but November 1 I was again debited not R200 but R340 , for what exactly? I called in and was told to hold on to be transferred to the cancelation department but each time the call ends without me being transferred. R340 from R150 for a contract that has expired and imagine paying R340 for 10gig, that's daylight *******.