New fridge not working

I purchased a very expensive Whirlpool All Fridge on the 17th July 2021. Worked really well until November. Logged a fault with Makro on the 12th November. Technician came to fix it about a week later and promised that it would not happen again. Unfortunately, it has happened again! Fridge does not get cold so I have sent various emails to Makro but no reply. So now I am sitting without a fridge for days!

I have requested that I want a refund or be allowed to exchange as there is obviously something wrong with this particular fridge.

Please assist. We are desperate.