Green Vertical line appeared on screen after software update

Green Vertical line appeared on screen after software update
I have been using Vivo X70 pro for 1.5 years and on august I did a software update as recommended by the phone and after that a green line appeared on screen from top to bottom. I have visited Vivo service centres. Technician told since I have a dent at the back panel, the resolution will be on chargeable. I told him that it got dent after 10 months of purchase ,but the line appeared last month.Inspite of knowing that the issue was caused by a software glitch and many users reported the same across PAN India, still they are refusing to fix it for free.
They said company is replacing display only on the phones with no physical damage and liquid spillage.
It is really very disappointing and not acceptable at all. why should I pay 13K to fix an issue which occurred due a software bug? is this how Vivo fixes issues? I do not expect any fix on my dent part but the issue which occurred due to update.
I have purchased the Vivo X70 Pro with high expectations for its performance and reliability. However, the recent software update has proven to be a substantial disappointment.Moreover, this display issue has been causing significant eye strain and frequent headaches, negatively impacting my daily activities and overall well-being.