a damaged IPhone
So i had bought a used iphone 7 from someone i had asked if there were any problems with it and he said everything was fine with it. So he said he would sell it to me for $200 but he wanted the money upfront. Its not like i could've kept it for a few days to see how the phone really is. 2-3 weeks goes by and the phone started to get hot later found out it has battery issues..and now the phone is continuously restarting its self. I had factory reset it twice and its still the same. I cant even go through with the update without it restarting every minute. What should i do?
iPhone 7, iOS 13