HTC — Mobile phone not repaired

Address:

Hyderabad, Andhra Pradesh

I had purchased HTC Desire 820S on 24th of July, 2015. The phone got switched off within 3 days of purchase. I have given my phone at the authorized service center and its been more than a month. I have been to the service center thrice but every time they say the phone is not yet repaired. I have no idea what to do, staying at a new place without a phone for over a month. Contacted everywhere, online support, customer care, service center but of no use. They are not ready to repair the phone. The phone is under warranty period and also fulfills the replacement terms but no action regarding this has been taken till now.