Intex Mobile / Intex Technologies — Warranty issue

Address:	Varanasi, Uttar Pradesh, 221003
Website:	www.intex.in

Sir, my phone "intex aqua star 4g" get damaged.
This is due to excessive heal evolved by phone, which causes water vapour.
Due to which phone damaged on 05/06/2017.
When i went to service centre, they ask for 1800 inr. But the fault is not from ourside.
So, i want a complete repair under warranty (Without any cost)