Faulty TV - no feedback from HiSense

I purchased a 55\ 3d smart HD Hisense television at Makro Cape Gate on 5 Dec 2014. My television was installed on 11 Dec and I noticed that the remote would not "pair\"" with the television. On 17 Dec i contacted their call centre to report that the remote could not \""pair\"" with the television. I was then contacted by Mastercare and on 22 Dec and subsequently informed by their technician that the motherboard is faulty. As this tv was only 3 weeks old i informed Hisense that i wanted another unit. I was then told to send them proof of purchase"