If it has been 3 months or longer without there being any activity on the account and there was a zero BTC balance then the account may have been purged along with all the transaction history and comms. Either way the admins will be unable to reset the pass phrase for you unless you can prove yourself as the rightful owner so assuming the account is still there but all the trans/comms history is gone you will need to provide a BTC address used to fund the account as that will be the only way of verifying you.