OnePlus India — Need a proper resolution for green and pink lines which is caused by your latest update oxygen OS 13

Due to latest software update to oxygen 13, All the 8t, 9pro, 9t mobiles got a green and pink line on screen. When I reached OnePlus service center they were saying we are not responsible to replace your screen if your screen has a minor or major damage also. It will be only replaced free of cost if your phone falls under warranty and has not small and very minute screen or phone damage anywhere or else need to pay 15-20k for screen replacement...