Game in Gateway Umhlanga Sucks

I have bought a Hisense 305 litre water dispenser fridge, i have been waiting for this fridge to go on sale and in the beginning of July the fridge went for r4999 which i went in store and purchased, they did not have stock but i opted to wait for the stock to come in, i had made full payment and also paid for delivery. A week later the fridge was delivered to me and it was winter so the fridge seemed to be working fine, once the weather started to get more hot i noticed that the fridge was not cooling enough but the freezer was working, i had then requested for an engineer from hisense to come check the fridge, the engineer advised that the fridge had an internal gas leak and i would need to be replaced with a new one. From then onwards i called game and they have not been helpful at all, the contultants at the Gateway Shopping Mall have not even tried to help me, they straight away said the fridge is discontinued and that they can see if a demo model is available for me, i wanted to take the demo model because i really wanted this fridge. After make a complaint, i was then called by a girl named Sarika who advised that i must come in to the store and pick which fridge i wanted, when i got there she was offering me a smaller fridge with no water dispenser and i did not want that, she then told me that she would call me when the specials start but never did, i went in last week for the second time to get this sorted and now she says i must pay the difference for the other fridge i decide to take, i must allow then to pick up my hisense fridge from home and then the next day they would deliver the fridge i picked from the store. I was not able to afford the extra amount so she advised me to wait for the specials and said she would make a plan, i then messaged her today and she is being so unhelpful its unbelievable, as someone who is representing a huge company like game she hardly even rep**** back, the questions i had asked her she rep**** by saying OK, i am so disappointed, not only has game put me in this situation they refuse to help me sort it out, this Hisense fridge has been making my food get spoilt and now its my fault to pay extra, i expected more from a company as big as game, some empathy and sympathy would be nice from the staff to start of with, the fault is not mine in anyway. I have been a great customer who has purchased something thinking that this is a good company to buy from. The lady Sarika is not replying to my messages and now i dont know what to do and where to turn, i can't keep running to the store as i am working, i have been so understanding in the process and thats probably why i am being taken advantage of in this way.