Apple India — Iphone 5s display scrambled problem

I purchased this iphone (5s spacegray 16 GB) in July 2016 through online (infibeam). One fine day My iphone gone blank and become scramble display like in the photo attached.That was a terrible day since I was sitting in a business meeting and my iphone left me in distress. Reported this issue immediately to an apple store in Madurai (planet mini)& Chennai (icare). Both of them told this problem is not covered in warranty. Further they denied to give any assessment report/ cause for the problem I face. There is no external visible damage. Total display need to be changed which costs almost new iphone 5s. This is my first iphone. I had great expectations from APPLE, sorry I am disappointed.