Carrier AC — ac is not working

Address:

Dhanbad, Jharkhand, 826003

Sir, we had bought this carrier ac from star marketing dhanbad
Day 1- this ac was not working. So, we complained about this. They came and solved the problem but we were not satisfied because ac was not cooling properly.
After one week, it was not working again. The ac was automatically being switch off. So, we complained about this faulty product and we requested to shopkeeper to change this carrier ac but they are not changing. They came again and try to solve the problem. There are almost four times, they came and try to solve but new ac consistently getting problem. Today ac is not being on