Apple India — Apple iphone 6S plus 64GB Display issue

Address: Udaipur, Rajasthan, 313001

Website: Apple.in

I am using this phone from last 10 months and it's still in under warranty. A few days ago, i found a white line on display at bottom side. I didn't know how it came up. After seeing this, I went to Apple Authorized service center in Udaipur. They took my iphone and gave me the service report and told me that they will contact me. After 1 hr, I received a call from their side and customer representative told that it caused due to liquid damage and they can't repair it. He told me that there are no alternative of this issue and I only have a solution that I pay them 26500 Rs. and they will replace it and give me new phone. I am sure that these white line is a part of display issue not the liquid damage. My phone is still in warranty then why I pay money. I purchased it in around 80000 Rs. and now I have to pay 26500 whereas I didn't do anything. It was a phone display fault not mine.