Accounts with funds can not be closed. Please send your username and issue to
support@duckdice.io, if you did not violate any rules that it's just got deactivated cause you did not have 2fa or email, we do it with old inactive accounts for account security.
That could be the reason why your account was closed, if this is true they are just protecting your account from intrusion, just prove that you own that account and you are good to go, but if you don't have email and 2FA it's not going to be easy you have to remember something on your dashboard or transactions coming from your wallet, I hope you can resolve this issue, it's hard to let go of that huge wage.