[Resolved]  Samsung — Samsung m31

Today I updated my samsung m31 phone but after few minutes it started auto freezing and restarting every 20-25 mins o[censored]sage. I use authenticate samsung charger and no third party softwares are present in my phone.
When I checked about this online, I came to know there are thousands other samsung users who faced/facing the same issue. When visited customer care they asked me to replace the motherboard which would cost around 9 to 10 thousand. But why should we pay for it as its manufacturing defect.
It is Samsung's fault and they should repair this for free.
please reply,