Send a email torecovery team, here is the email address  from original mail associated with your account. You should include you username and you have to explain briefly how your account locked/hacked. Since you had not signed btc address your ETH address would help you if you are lucky enough. You should include your unedited post link as a proof of ownership. If you don't know how to sign message from ETH address then this article would help you. I believe you have private key of your unedited ETH address. So try this method hope you it will help you recover your account.

I think the recover account right now already has a few actions to do it a Signature Address. Altcoin "Sign Message" could be accepted.

I help one of my local community members, he not doing a stake bitcoin address but can unlock his account using Ethereum Sign Message.

Just try to communication your account problem with Cryptios team, ask them to verify the account using the altcoin sign message.

What that means https://bitcointalk.org/index.php?action=trust;u=48981
Are you sold it without payment?

Maybe check your Email here https://haveibeenpwned.com/  that shows you if your email got compromised !
Also if the Hacker got access to your email and just wanted your account its easy to change just the email on the account .
Hope you already have changed your email login.
Also try to remember what sites have you used the last days or have you installed some software or wallet the last days .
Its possible that there was an Software that stole your login .

Maybe you have ever posted your btc adress here on the forum !
In some Signature Camp. or somewhere else .
If you have done that you can send a signatured Message from there , but i would advice to follow the Cryptios steps for recover your Account .
Wish you good luck with that !

There isn't much you can do. Try following these steps Recovering hacked/lost accounts. There is also the Cryptios team which handles account recoveries you can check in at that topic and see what else can be done if anything. They can see IP info and some other things that generally can help them determine account ownership.

Note to everyone else Stake an Address somewhere.