Bookings Service availability defined by Shifts availability

hi

I've been trying to set-up a Bookings service with 2 team members.

My difficulty is that they have different shifts (and they vary every 21 days...)

I've been told I could use Shifts to show availability, but it's not working.

Availabilities are all over the places and it's creating mayhem...

I have been searching tutorials on youtube, threads around here and can't see anything that shows me ow to connect the two.

Help please 🙂