Faulty fridge

I purchased a double door fridge from house and home gateway in June 2020 and jst over a yr later I had a problem with the fridge not cooling in september 2021, they sent a technician that had to replace the part he told me they are aware these fridges are giving this problem and they had to fix other fridges like mine. Why did house and home sell these fridges knowing there were factory defaults. In that time I had to throw most of the food due to spoiling, again I hv the same problem and dropped the temp. To minus 18 degrees which the technician told me to do and the ice is building, I called house and home on 18/10/2021 they said will get a technician to contact me and nobody did i called again today 19/10/2021 and they again said will get someone to come out this week or next week. This is pathetic service. The fridge is just over a year and already giving me problems I want this fridge replaced with a fridge in a working order without factory defaults I paid a lot of money not for something thats faulty and has to be continuously repaired.