OnePlus India — Due to bug in my mobile raised problem

I purchase my ONE PLUS 8T mobile in 2021. But there had no issued in my mobile but. Now time Due to Company Bug, in my Mobile screen a long green line occurred suddenly when I was using. I had to take my mobile in Authorized service center. They awarded me this type of Bug problem and suggest changing my Mobile touch screen because of out of warranty. but My concern was that My mobile had not disturbed by Me., so I am not responsible for this. this is responsible for Company. they are also accepted even that was not helping me for solving this problem. I also complaint in ONE PLUS Mobile (Complaint num[protected].