Autopage shocking service & incorrect billing

An iphone 6 16gig was sent to me as an upgrade from a samsung S4 32gig. I went to a branch within 5 days to return it still sealed! A 16gig is no 'upgrade' from a 32gig. Was told a courier service would fetch it. 10days NO RESPONSE. Went to another Autopage branch to be told they couldn't help but gave me the number of the source of the phone. Phoned & was told they would phone back! Nothing! Phoned at leased 8x within 2 or 3 days am still waiting for the reply. Went to Another Autopage store & was given another number to phone am still waiting for a reply. Finally found a very helpful lady at EC3. She has sent several emails to head office. She too is unsuccessful. I was about to leave for an overseas trip & through this lady at EC3 I dropped the phone off at East Rand Mall branch on 18 August! I was charged for the phone on 1 August which I paid as I did not have the time to deal with it. Was charged AGAIN on 1 September, a bill of R1300 of which i paid R500. I have been cut off completely due to ALTEC'S INCOMPITENCE! Can't pay any accounts or prepaid electricity or any internet banking as all responses come on the phone. Can't let people in at my gate or any other emergency.