Xbox series x random turn off

My series x randomly turns off while playing,sometimes occurs many times during a day and sometimes not,it occurs mainly in fifa 21 as i play mostly .i made sure that it has no heating or any other problems and made all steps required even full reset without any benifits.

The big problem that i live in counrty that has no microsoft service and i feel so bad about spending 640 $ to buy from a third party seller for a defective device,

Any suggestions?