This guy is a Hacker. He just changed my email address and wallet address. He even replaced my Stake affiliate link with another one. I locked this account already but, I don't know whether he is able to recover the account with this signed message.

If you can sign a message from one of those addresses you will get back your account.
Bitcointalk username: kurian
BTC Address for payout: 3JsknZV5h6Bn6DDoMDMG7m6xvjVv91P7vm
Bitcointalk username: kurian
Rank: Jr. Member
Current post count:52
BTC Address: 31nSfRyDcfYmLjCLrckQNJGayN9PQKkCJz
You have also another addy from kucoin but I don't know if you still have control on it, you can't sign a message but maybe sent a few satioshi to the recovery team for proof. IDK.
here is my BTC deposit address on kucoin 1J9G18j2F6dAsEP1AvR5SWqMWb6YC9U4EY