Problem with brand New Hisense fridge, Hisense ignore and refuse to replace

I purchased a new Hisense fridge from Game PMB on 22/10/2017. Since a few days after purchase, I noticed that the fridge was freezing items stored in the crisper drawer, and neither the fridge or freezer could be turned colder than its second warmest setting as this aggravates the problem. I first logged a call with Game on 27/11/2017 about the faulty fridge and was informed by them that the matter was escalated to Hisense. By Feb this year, no one had attended to this from Hisense, until I further complained to Game and eventually a technician came out, who acknowledged that there was an issue with the fridge, but no visible fault could be found. He told me that his superior named Neeren would get back to me the next day. He did, but instead tried to convince me that this was normal as it was the coldest part of the fridge. After refusing to accept his explanation, he promised to take the issue higher and get back to me. He never did until I called him back about a month later (8/03/2018). I called him again on 14/03/18 and he told me he would come out himself, which he did on the 23/03/18 and changed the board responsible for operation of the fridge. He asked that I message him in a week to let him know if the issue was resolved. I did message him on 03/04/2018 telling him that the problem was still there. I even attached pics of the frozen foods. My message was read and ignored. On 6/04/18 I messaged him again and was again read and ignored. From brand new, this unit has been faulty and it seems that Hisense have no intention of replacing a faulty unit. It is almost 6 months since date of purchase and I have wasted a great amount of money on wasted frozen food. Hisense, please respond!!!!!