Whirlpool India — Refrigerator bottom freezer

I bought whirlpool REF IFPRO BM INV 370 ELT PLUS during January 21. Right from day one it is not working properly. Only freezer working and fridge section is warm not even room temperature. All items get rot. Complained- company service person came and just changed the without doing anything during warranty period. After warranty period of one year, the problem has become worst. Fridge portion hot and freezer full of ice deposit with two days of removing ice by switching off . Service person was called again he says circuit problem and changed it at my cost.
Now same problem

Why whirlpool is making a defective and substandard product and offering to consumers. Sorry that I selected product.
Service person ketan patel from NK Enterprise and its owner are not able to identify the problem

Please resolve