When the Button get’s clicked, add an Action here:
Add the Action Display Data in a Group, and you will want to display ‘Current Cell’s Date’ in the group called Group Create Booking
Then on the ‘Confirmer votre rendez-vous’ button, under the Create TopCal Booking Action:
Add the field ‘Booked range’ = Parent Group’s Date <-range-> Group End Time of Booking’s Date
(You will also need to change the Data Source of the Group End Time of Booking to reference the current page’s TopCal instead of doing the Search)
Once you start saving the Booked Date Ranges correctly, then you need to feed the Booked Ranges into the TopCal element here to remove the Time Slots from being available:
Here you will do a Search for Bookings associated with that schedule.
Hopefully you can piece things together with that, but if you need more assistance it would be easier if you changed the app to be Edited by Anyone