I am extremely unhappy with the CELL C customer service

I am very disappointed with Cell C. I reversed an upgrade and was told that it would be resolved within 48 hours. I called again to check the status of the reversal and was again told to wait another 48 hours. I have emailed customer service as well but no joy there too. Now I am receiving SMSs to state that my upgrade was successful and receiving Topups which would mean that I received the handset. I want to cancel my contract but I am getting the runaround and I hope I won't be charged for something I did not request!!!