I've an Aussie namesake who has used my gmail address a few times on sites. I never use my gmail on anything. My spam folder for it is dominated by Australian

I've an Aussie namesake who has used my gmail address a few times on sites. I never use my gmail on anything. My spam folder for it is dominated by Australian targetted spam, to a degree I find mildly fascinating. Recently, google/gmail decided to be too helpful. The namesake used my email address when they booked a stay at a hotel (helpfully the hotel made it impossible for me to unsubscribe!) The hotel has sent me a few emails related to the booking, reminders and the like. Google being Google, sees the email, and creates a calendar entry for me. I delete it. The next email comes in, and boom, there's the calendar entry again.