Again my Saturday morning yoga classes are cancelled

The key phrase here is " I work for". The answer to your question is, they don't care about you making a living. I'll bet many of your students aren't very happy about the cancellations either. Perhaps you can look into what it would take to conduct private lessons away from the control of the gym or studio. Just a thought that I'm sure you have already pondered. 🙂

Learn Pilates too. I just had my morning class and feel great. The instructor was a gymnast teacher and got trained for Pilates. Now she's running her own pace and she'd booked solid.

Cancelled why?

You mean you are paid by sessions and not per mensem.