“… There is no way of contacting anyone at Google about it …”
Of course there is: you pay your lawyer to send correspondence by registered mail.
Then you have them send followup correspondence a week or so later.
You will absolutely get a response.
Everyone everywhere has the money and time to keep a lawyer on retainer. This is super equitable and a reasonable way to run society
Nah, we all pay for a lawyer with our taxes: the attorney general.
What you do is send Google your own correspondence, certified mail, giving them a heads up that you've contacted the attorney general. That usually gets an even quicker response than from a personal lawyer :)
It also gives the attorney general office a heads up if they need to be scrutinizing a company like Google more carefully if they're getting a lot of complaints.
Situations like this are exactly what they're here for.
https://www.naag.org/find-my-ag/