Refurbished G5 from insurance claim is constantly rebooting since I got it

[Hawkhell]

I got the phone from my insurance and I didn't mess with it for a week and when I finally set it up it started rebooting randomly and now it can't fully boot without bootlooping. My insurance company are slimy and refuse to trade this one out. Any idea what I could do to fix this?

 

[Hawkhell]

Mistake post. I have a G6. sorry.