I've never been able to track down an email and if I do it's from calendar@google.com or something along those lines. These are people somehow inviting you dire

I've never been able to track down an email and if I do it's from calendar@google.com or something along those lines. These are people somehow inviting you directly through an invite and you never get an email. I had this happen about 5 times over the last 2 weeks. I've disabled everything I could in all of my calendars now (including Samsung which I missed). Incredibly frustrating because I can't even BLOCK the person/bot sending this.