MTN Business Upgrade - absolute nightmare.

I received my MTN business upgrade approximately 2 weeks ago after upgrading telephonically. Upon being read the terms in this upgrade application, I were told that I would be allowed to return the phone, no questions asked within 7 days, if I were to decide I do not want it. Upon receiving the device the Friday, we visited MTN Century City the following morning. I were told that I am not able to return the device as I upgraded via the MTN Business sales line. Upon further inspection, I found info on the internet that I am indeed able to return the device and that several other customers experienced the same incident. I sent an email to MTN about this where I were then told I am not able to return the device if I have opened it. I am now stuck with a 36 month contract, with a phone I absolutely despise. I do feel that this needs to be brought under the attention of the CPA. Terrible back and forth service from the provider I deemed the absolute best after years of loyal support.