Apple India — iphone 7 plus dead

Address: 248001

My iphone 7 plus just got out of warranty and suddenly stops working when my phone was charging last night and today service centre guy says that my phone 's mother board is not working and the cell phone is dead now. Need help on thi s as i a bought just on the feed back that it doesnot get damage and i am in a delima that why ibought a phone worth 60k when it is of no use to me after 14 months.