Faulty iPhone 6 Plus and Exchanged device

I purchased an iPhone 6 Plus through my upgrade. After having the phone for a month it starting glitching and freezing. I decided to finally take it in as the problems started to escalate.<br> <br> I finally took it in - where the IMEI number was scanned and it was brought to my attention that the phone didn't match up in terms of the \gig"size and colour on the system. Vodacom then told me I'd have to book it in for repairs. Now"