Autopage *****ing my money!

I started noticing in January that I was being charged a lot for data. I checked my invoice from Autopage and my 150MB data bundle that comes with my contract as well as an additional 500MB data bundle both get charged for every month. Yet when I look at what I am getting charged for data, the usage is way below what is covered by my bundles. Why am I being charged exorbitant amounts for data that I am already paying for? And why does nobody phone me back when I call. They say \we are escalating the query' and \"we will call you back\". Thank goodness I didn't hold my breath. Calls were made on the following dates and times: 1 Feb 2016, 3 calls (27 sec, 50 sec & 3 min 14 sec), 28 Jan 2016, 1 call 5 mins 4 sec and 21 Jan 2016, 1 call, 3mins 8 sec. Somebody needs to sort me out before you close your company in 2 weeks and I am stuck with Cell C and no leg to stand on! I need to be refunded for all the data I have been charged for incorrectly. Alternatively you can close my account at no charge to me and I will purchase a \"pay as you go\" sim. "