What is photo.app? it's better to use other third party hosting image e.g. imgur, imgbb, postingimages etc.

So they're accusing you for multiple accounts usage, well I think they need to give a proof if you're really use multiple accounts. But are you not using VPN? if you've use it to access the casino, there's a chance someone use the same VPN apps you used and same countries you're choose.

They have an active ANN thread in this forum Metaspins.com - Crypto casino - 100% Up To 1 Bitcoin On Your First Deposit, since it's a large amount of money, they need to handle this case.