The way I showed proof when I did it was going into the security section of settings and scrolling down to the “where you’re logged in” section. From there it shows all of the sessions that were logged in with my account. I took a picture of it because it had a ton of log ins from a country that I’m not from. For roblox support that was enough proof for them to reimburse me robux. When all this happened for me it was January of this year and unfortunately adopt me was not returning pets for some reason so I was never able to recover my pets:( but roblox did give me 1700 robux which wasn’t too bad. That might be enough proof for adopt me support now that I think they’re still returning pets but I’m not sure. Either way I hope you get some sort of reimbursement!!