Asus India — Asus zenfone max display went off suddenly

Address: West Tripura, Tripura, 799009

Website: Asus India

I brought this asus phone on 6th may and suddenly a week ago while i was doing facebook the screen went off. I thought it might be due to low charge but afterwards i saw screen is vibrating when i touch it but no display. I caller customer care and placed a service request then i visited my local service centre and they told due to external pressure my phone display broke from inside. Technically its not possible since it is corning gorrila glass. Moreover as i was doing facebook there is nothing like external pressure. They told me i have to pay for the screen which costs me around rs.4200 while new phone price is rs.9200. Please help. Not a single scratch is there in the phone. I wish they could prove me that it was due to pressure as my wife didnot use any force on the phone.