While doing a security/privacy checkup today, I discovered that Google keeps a list of purchases, reservations, etc. at myaccount.google.com.

Note that I'm not talking about purchases I made from a Google entity, or reservations I made via a Google app. They comb through your gmail, lift the details of purchases, reservations, and subscriptions that show up in the emails, and compile a list of them for...reasons?

I don't want to get into a discussion of whether I should have known that Google would take each order confirmation email I received from Amazon.com purchases and logged it in their own separate archive. I just want to know how to delete it.

The help articles basically say that you "might" be able to delete each entry by clicking on each entry and clicking the little "i" information icon, but I have yet to find a single entry that can be deleted that way.

I have spent a couple of hours trying to figure out how to contact Google directly about this, but I've had no luck. The "contact" page seems to contain no way to actually contact them.

Also, once I've deleted these, how do I opt out from having them recorded in the future?

Thank you.

Edit: If you want to see your own history, go here: https://myaccount.google.com/preferences#subscriptions