Yes, this has happened SO MUCH, even after Contracts are signed!!! Last time it was a Tyler, TX hospital NM that didn't want to pay for a 48 hr contract guaranteed hours, but let me know up front she was going to schedule me for 4 days per week (12s). It was a 36 hour a week commitment. I had been working 60 hour weeks for 4 months, and I wanted a break, and to get sometime with my spouse.
I told her calmly that I had chosen this assignment because of the less hours, and I would only be able to provide the "contracted 36," and she was, . . You guessed it, Infuriated!!!
It made for a long awkward assignment (just for her, everyone else was great). This attitude of arrogance has to be quelched real quick. Once you give in and work their "unfair" schedules, they take you for granted.
If you are covered by policy and procedure, then pursue it. It's already Friday, so hurry!! Go to the next person in the chain of command, and address EVERYTHING that has happened, the phone calls, emails she wouldn't return, and that you are NOT coming in on Easter- and you wanted them to be aware.
This is soooooooo unfair, and it happens all the time. If we continue to bow to these arrogant jerks, what is the good in a contract or understanding? Happy Easter!