Samsung — Samsung S20+ Green lines on screen

My galaxy s20 plus mobile phone suddenly has a green vertical line on the screen. There is not physical damage to the phone and it is completely intact. Initially it was one green line which did not bothered me much but not there are numerous. Having checked online multiple users have raised the very same issue. After paying such a hefty price tag for a premium product it is disheartening to face such ordeal. When I visited Samsung authorised service center they are charging 18000 for screen replacement which is too much.I hope Samsung India redress my grievance.