Zero after-sales support

I purchased my new iPhone over a week ago. I was told that I needed to register the phone online to activate the warranty after which my R2000 voucher (as advertised) would be awarded. I registered the phone the very next day. It has been over a week now and I have had no confirmation of the registration of the device nor have I received my voucher (which I was planning on using to purchase a cover). I have emailed Incredible Connect 3 times during this time and my emails are being blatantly ignored. I have even sent an email to the manager at the Cavendish branch who assisted me with the purchase and have yet to receive a response. In addition to this, the order was processed incorrectly and R400 extra was taken off which had to be refunded. It just seems the after sales customer services is non-existent which is such a pity because the staff were friendly and helpful in the beginning (hence the 2 stars). At current I have no warranty, no voucher and absolutely no response from Incredible Connection (which to me is the worst part).