Frustrated!!! No service

My Cell C contract expired 4th June 2015. After following all the correct channels and giving them a months notice I was informed by the consultant that I will only be charged a prorata amount for the 3 days from 1 June - 3 June and any data charges after month end. Payable end of June. I called again end of June to find out what the data charges and prorata amount for the 3 days amounted to. I am then informed by the consultant a full months subscription will be deducted from my account end June and then credited end of July. I refused and in no uncertain terms made it clear that cell c do not have my permission to deduct any monies from my account except the 3days from1-3 June as I was told before and requested an invoice for the 3 day charges(it was not sent). The money was deducted despite my refusal.Once again I called Cell c today and after holding 36 minutes and spoke to Xolani ***(the most useless consultant ever) cell c could not confirm when my refund will be paid back to me. I am so frustrated and mad that cell c can deduct what ever amount from my account without my permission and then still drag their feet in paying me back.