You should make yourself a backup for each accounts that you use in casinos and emails. But as long as you've provided them with an accurate answer based on your email and account, it will be retrieved.
Don't you have any other cellphones or devices for you to log in your account or you've completely kept the record of your account through that phone?
Well, in good faith they'll help you with your account access again.
I have got my phone, with the help of email I found the person who found my phone, he is an honest person, thanks to him I can access my betfurry account again, I am really grateful to him, finally I can play again on betfurry
Well, that's in good faith of being returned to you. Not only about the account that you've asked for retrieval.
Now, it's best for you to make a back up and don't record everything on your phone if it's the credential and login details of your accounts.
Make sure that you make some back ups that you'd have just in case if something bad happens again to your phone.