Koryo — refrigerator

Address: 400011

I have purchased a refrigerator from koryo showroom located at hiranandani.
The refrigerator completely stopped working after 15 days. It's been 2 months since it stopped working. I have done alot of follow ups but they are only sending their technicians who is not able to figure out the problem. I have requested them to exchange it but havent received any reply yet.