I sign up with my email, and BTC address is default from site, How do I prove it? , I haven't made any withdrawals yet.
As I have already explained to you countless times via PM you cannot prove ownership therefore I cannot recover the account to you.
The default Bitcoin address is your deposit address and so therefore belongs to us. If you didn't change that to an address that you control the private key to, you didn't deposit or withdraw from an address that you control the private key to, you didn't turn on 2FA despite as constantly asking you to and then you had your email hacked there isn't anything I can do. How many more times do you need me to tell you that?