Yaantra.com — they are not claiming my warranty

Address:	Mumbai City, Maharashtra, 401101
Website:	www.yaantra.com

I gave my phone to yaantra.com regarding the repair.

On december 23 they told me that there is a motherboard issue and it would charge about 4500 inr, i got it replaced properly with 3 months of warranty.

The same issue happens to which i resubmitted my phone on 25th january 2018, the part was under warranty.

The main part - from last 15 days they are giving some or the other excuses.
I mailed them 3 times, but as usual, the response was "we are working on it".

I paid for my service but i am unable to claim it.
Yet i have not received my phone.

Request id : 96782