HTC — Newly bought Htc 826 phone not working

Address:

Hyderabad, Andhra Pradesh

I bought a brand new HTC826 phone on 21st may, 2015. It is not working since 28th June, 2015. I went to the service center thrice and they told me that they cannot repair as this problem has occurred with so many customers. The customer care promised me get a DOA as even the service center is not ready to repair it. I called so many times after that and the customer care told that the request is pending with back end. Finally today when I called they told me that they cannot provide me DOA as it has been more then 14 days. I have submitted whatever documents they asked for. First they promised and now they are refusing. I bought this phone for around 25 thousand and i am not getting any help from the Htc side. I am attaching my invoice copy and their response. Either get me refunded of DOA.