OnePlus India — Oneplus 7t damage due to company Software Update

I bought oneplus 7t on 29/09/19 while using the phone few days ago on 16 june 2023 my device hang and not responding anything i tried to restart but still no response was there i try to reset my phone then also no response was there but my phone was dead not charging nothing response was coming. I took the phone to near service centre they check the phone throughout and told me due to software update and glitch the motherboard of the phone has gone and damage cannot be repair asking 25000 for new motherboard. That was so mean if your phone cannot support update why would to release to install get motherboard damage. Its wholesole company respnsibilty to give the replacement of the phone, cause the damage was by the software which was released by the one plus company.