Xiaomi India — redmi note 5 pro issue

Address:	400101
Website:	www.mi.com/in/service

My phone got switched off automatically while watching a video. I visited the mi service center in kandivali (E) the next day. They made we wait for 1 hour and took my details. As my phone is in warranty, they came up with issue of liquid glitch and told it will not be under warranty and i had to pay charges. Though my phone dint interact with water, i asked them the amount. They asked me to pay rs. 7, 840. (More than 50% of my phone value)
I asked them to return my phone and i am not willing to pay the amount, so they started negotiating on the amount. I feel i am being cheated as my phone is in warranty and should be repaired free of cost.