So sorry to hear about your poor experience. I agree with everyone else.....she got into it without really understanding the business or what to expect. You are absolutely correct in feeling ripped off. You should absolutely get your deposit back, but the question is how up to the chase are you? It's a shame that providers like her are out there because it does indeed make it hard for dedicated newbies to get a good start.

The fact that she asked you for the deposit immediately prior to starting your son makes me think that yes, you've been scammed a bit. It sounds to me like she was just looking for any 'reasonable' excuse to let you go. Anyone who's in this business knows it takes time for a child to adjust. It's almost never an immediate fit. It's hard and no one enjoys the transition, but it's part of the gig and we've all gone through it many times I'm sure. She was terribly unprofessional.

Good luck in your (I'm sure frantic) search for daycare on short notice. Again, I'm so sorry you had this experience.