Attempt 1: Entered email, got captcha, clicked "try another way". Result: Google couldn’t verify this account belongs to you. Try again later or use Account Recovery for help.

Attempt 2: Entered email, got captcha, completed captcha, got enter last password screen, clicked "try another way". Form asked to confirm phone number. Entered phone number, sent code (which I can't get), clicked "I don't have my phone". Site asked for alternate email, which I provided and supplied the code. Result: "Reply to your Google support email or contact to let the team know you've successfully completed your account recovery request. To try signing in again, follow the steps in our Help Center on how to recover your account."

Attempt 3: Entered email, got captcha, completed captcha, got enter last password screen, entered password, got asked to confirm phone number, clicked "I don't have my phone". Site asked for alternate email, which I provided and supplied the code. Result: "Reply to your Google support email or contact to let the team know you've successfully completed your account recovery request. To try signing in again, follow the steps in our Help Center on how to recover your account."

All attempts were done with new Chrome Incognito windows and no other Incognito windows open. I still can't sign in at all. Is this account just permanently locked?

Attempt 2 enabled the potential internal escalation to proceed.

The form is now asking me for details that we best talk non-publicly about. What's the best place to contact you privately, other than HN?