Missing Booking Pages

We discovered that we are missing 11 booking pages. They were created in the past few months but now see nothing listed. What are the next steps we should take?

Here are a few links that no longer work and can't see on the back end:

https://outlook.office365.com/owa/calendar/JessicaRandolphatTeam1MedicalStaffing@trnstaffing.com/bookings/

https://outlook.office365.com/owa/calendar/RoseanneFaillaatExecuTeamStaffing@trnstaffing.com/bookings/