you spent 800 on an account that wasnt verified??
like some people said above you could probably show some of your receipts/exchanges but if that doesnt work then i dont know what to tell you.
you should be smarter with your security (and money)
What ever is best for you is to get a VPN and if you have a phone add your phone number to your roblox account so it's a step harder to hack in your account and if not try any VPN to protect your cookies and contact Roblox support