Hospital constantly calls...

I am nursing student in a CNA position at a hospital on a GYN floor.

When I was hired I told them my availability was evenings/nights- weekends only with 1 weeknight shift. This is what I am scheduled for so my actual shifts aren't a problem.

The problem is the hospital CONSTANTLY calls me and asks me to either A) come in earlier or B) work day shift.

I was hired with them knowing I cannot come in before 7pm ( because I am in class and I have kids and have to wait for finacee to get home from work before I can leave)....yet it still never fails....the phone rings basically daily.

Although I have to keep saying NO ..except for the few occasions where I was actually able to do it...they always act rude....like it's MY fault they are understaffed and I can't help them out. Twice they left messages on my cell phone that I didnt get until it was too late and then they act like I'M RUDE because I didn't call them back in time.

Seriously I do help when I can...but I usually cannot come in for dayshift.


Anyone else experienced/ing this? It's driving me up the wall and down the block.