Unwanted calendar subscriptions

You got phished.

Here’s how to clear it:

How to unsubscribe from calendars on your iPhone - Apple Support

Here is a small selection of the schemes to try to scam you:

Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

Apple’s been running a banner about this:

Probably you have accepted an offer or subscribed for a spam Calendar accidentally. Watch the GIF below to know how to unsubscribe. Look for an unknown Calendar on the device under subscribed calendars.