Samsung — Motherboard issue

Hello all,
I purchased a Samsung Galaxy M31s phone in october 2020, The official release date of this model is 2020 July 30, which says that it is pretty new and we expect descent updates over first few years. After a recent OS update (security patch update), my phone started freezing and auto-restarting every few minutes. It finally switched off with only logo visible which is not even letting the device to get into bootloader. I went to a nearby Samsung service center (Samsung Service Centre bareilly) and they told me that the motherboard needs to be replaced.
There were over, at least, 700-800 people with the exact same complaint in the internet and Consumer Complaints forum regrading their phones (all Samsung M-series phones). The update caused the motherboard to fail. I have multiple samsung phones in my home. I got problems with 2 phones recently (both are samsung m30s phones). I paid hell lot of money to get them replaced as service centre's told mother boards need to be changed.
Please, have a look at the disaster the updates have caused. And kindly provide a free motherboard replacement or refund the amount. BEING A STUDENT(WITH NO EARNING) AND BELONGING TO MIDDLE CLASS FAMILY WITH NOT SO GOOD FINANCIAL CONDITION IT IS NOT POSSIBLE FOR ME AND MY FAMILY TO GET IT REPLACED It's a blunder done by samsung and expecting customers to pay 9-13k.