Samsung — Samsung Galaxy Z flip 3 having green line observed on screen

Address: Silvassa, dadra & Nagar haveli 396230

I had purchased Samsung Galaxy Z flip3 mobile on feb.2022, and recently green line observed on screen, as there is no any damage or scratched on mobile and it is ok, all of sudden green line observed. Since problem occured, I have continue in touch with Samsung service center/Samsung customer care and whatsapp chat, but from everywhere reply is my phone warranty is over and can't help. This is answer from Brand like samsung. I have made job sheet for complaint, but after diagnosis, service center person says, need to change display which cost Rs.32k which is not acceptable and affordable to me, as its technical problem from samsung that green line observed suddenly.

My question is why should I pay if its samsung technical problem.??