Asus — zenfone display problem

Address:

East Godavari, Andhra Pradesh

I am using zenfone5 (A501CG) having serial numbers SN:E7AZCY900863. which i bought in Sep 2014. Till y'day it was working fine, suddenly a dot was appeared on the screen and with in a hour it spread across the screen. Display was gone, we don't have any crack on the external screen. I am able to attend the calls, it seems that problem is with the display. I trusted in ASUS and bought this mobile. What should i do now ? i have been complaining about this problem from a week but there is no proper response from the ASUS customer care center.