Incorrect Billing and failure to process refund

I did an upgrade on my contract in Nov 2014, when the delivery of the phone was done the delivery person requested a proof of address of my workplace which I did not have seeing that I do not live at work. I therefore asked him to take the phone back. I immediately called Autopage and spoke to Clive who assured he that since I did not sign for the phone my contract will not be upgraded. This never happened when I rec'ed my Dec 2014 statement it was R307.82 instead of the usual R169.00. I called Autopage on the 07 Jan 2015, when I got back from leave, I spoke to Lerato ***, he told me that the contracted was upgraded mistakenly that is why the billing was so high and that is why my BIS was not working on the current phone. A refund will be processed to me in 2 weeks time. After 2 weeks NO REFUND and on my Jan 2015 I was billed R652.34 instead of the usual R169.00. The contract was still not corrected, I called in on the 20 Jan 2015 and spoke to Taiar ***, who assured me that both my refunds will be processed in teh new 2 weeks, still I am waiting no refunds. Never again will I take a contract with Autopage, they quick to take your money but slow for anything else