Asus India — Asus do not have buyback policy and repair cost is more than cost of mobile

Address: Hyderabad, Andhra Pradesh, 500083

My mobile is under warranty and had to get it serviced in an un authorized service center as they dont have their service center near to my village, and after some days gave my mobile to their service center they told it would be considered OW, i agreed but they told the mother board to be replaced and cost will be 8500, i purchased mobile for 8999, i asked for replacement under deprecation, but they denied saying they dont have any such policy, i called their cc, i had couple of chats.