Github account recovery stuck

Question

I am using google authenticator for github 2FA code. My scenario is as follow

1. I can enter my password.
2. Google authenticator is gone after lost my phone. So I cannot type 2FA.
3. I choose Use a recovery code or request a reset.
4. I don't have recovery code and I choose Locked out? Try recovering your account.
5. Step 1: I do Verify an email associated with this account.
6. Step 2: I try Verify a device, SSH key or personal access token, I got the situation as follow.

I cannot choose any options in Step 2. The options are disable. I would like to know why this is happened. And I would like to get suggest to get out of this stuck. I would like to know directly mail contact for github support. I am asking in here because I cannot login to ask in support.github.com.