Hi Mitch, this has just happened to us. The time stated by Airbnb for the "guest to make payment or reservation will be cancelled", has already passed. The message ".... has less than an hour to complete payment, or their reservation will be cancelled, penalty-free." is still appearing, and it is now over 12 hours past the expiry date. Our calendar is still blocked. And there is no tab to cancel this from our calendar, or cancel it through messages. The guest appears to have verifications and reviews, but there is no visible contact phone number. Guest not responding to message through Airbnb. How do I get this bogus reservation off my calendar?