How to reach someone to recover a Gmail account?

I can't access my 13+ year old gmail account because Google now requires I verify I have access to a phone number I've never owned (the UI shows me the last 2 digits of the number). There is no 2FA on this account, I know my password, and have access to the "Recovery Email" (which gets emailed a "Someone just used your password to try to sign in to your account." warning whenever I attempt to sign in to the account with my password).

I reached a real person at Google Domains and managed to get things escalated to "Specialist". Their response: "we can't help you, post about it on the community forums" (which I had already done 20 days prior).

This account "owns" digital goods, thousands of songs (likely deleted, as Google Music has since been shut down), and some domain names. Google is actively stealing these things, but they don't care and, "can't help".

I'm just looking for resources to reach a real person that can actually do something.