OnePlus India — Vertical green line on one plus 8T

I am using one plus 8T from past 2.3 years. I am seeing vertical green line issue from 07/01/2023. My mobile is not dropped not fell in water and no physical damage as such. I have contacted customer care but they are not helping. This is the issue because of their update of OS 13. Though this is their fault, one plus team is asking us to pay 14000 for changing the display. If it is my fault I should bare that. If it because of their issue why should I pay so much from my pocket.