Apple - Spam iCloud Calendar Invitations

Regarding how to prevent this in the future (question #3):

1. Log in to iCloud Calendar on a computer web browser

2. Authenticate if needed, then select the Calendar view

3. Select the Settings Gear icon ⚙ in the bottom left corner then hit Preferences...

4. Select Advanced

Choose the option to receive calendar invitations by email instead of allowing the server to insert them without review into your calendar:

5. Select Email to [youremail] instead of In-app notifications

You now get to decide and delete or process calendar spam like regular email spam, allowing you to filter out these spam calendar invitations systematically.

I've had the exact same email. I've managed to get rid of it by doing the following:

1. Create a new iCloud calendar - I called mine junk
2. Move the spam invite to the new Junk calendar
3. Delete the newly created Junk calendar with the spam appointment in it - ensuring you select the 'Delete and Don't Notify' option in the Dialog box that appears.

This worked for me - I hope it works for you too.

Apple made a 'report junk' button inside the calendar app on iCloud.com - when you report an invite it will be deleted across all synced calendars.

If you get an invitation that you think is junk or spam, you can report it to iCloud.

1. Sign in to iCloud.com with your Apple ID, then click Calendar.
2. Open the event you want to report, then click Report Junk.
3. Click OK.

The event is automatically deleted from your calendar on all your devices where you’re signed in with the same Apple ID.