Bad service and over charging

My contract with telkom ended in December,I was called to upgrade in November and I clearly stated that I will not be upgrading nor will I be on a sim contract on my number .. on the 1st January I called in for immediate cancellation,spoke to Azola who told me that within 24 hrs the issue will be resolved,I called again this morning only to be told that he did not log anything,now I am liable for payment of something that I did not give consent to and I was told someone will call me even now I'm still waiting for that call...telkom rips people off be careful before taking any contract with them.now I am told about the month to month whatever which I was never told about and to my knowledge 24months ended in December!!