Spam Calendar Invite Won't Go Away
I was recently on vacation and, out of nowhere, received a SPAM calendar event (no invite). I've declined the event, but can't unsubscribe. There is an unsubscribe link in the invite, but it's obviously spam, so not worth clicking. I've narrowed it down to my work Microsoft account, have deleted it, however the event still keeps showing up after a second or two after being declined. I've searched my work email (to see if I can delete it in the SPAM folder, etc.) but nothing shows anywhere.
The invite doesn't show up on my work laptop or anywhere else, just my iPhone iCal. If I delete or turn off the calendar, the event goes away, but so does all of my work stuff too.
I've tried/searched other posts about it, but they are either not relevant, offer solutions that don't exist (there is no "unsubscribe" on the iCal app), or are outdated. I don't have this issue on my iPad, work iMac or other devices, it's only on my iPhone (so far).
Any tips?
iPhone 12 Mini
iOS: 17.2.1
iPhone 12 mini