Karen,
As a mother of young children, not as young as Faith ( they are 8 and 11) and for her teachers to be treating her and you the way that they have is appalling! No body who deals w/ children no matter how easy or difficult should not be disrespectful, especially with what you and her have experienced.
If anything they should be educating themselves further as to how they should be around Faith. And yes as you have said she has had too much for a little girl that is just not fair! and btw, if you're paying for their "services" they are working for YOU! and not the other way around!
Even if you have definitely decided to change day care centers you definitely have to let these people know of their unprofessional and uncompassionate "caring" they provided Faith.
Please be strong, unfortunately there are people around you that don't understand how you feel, they only view it from their perspective and they haven't been thru what you have, so they are the people you don't want to pay attention to!
Hang in there, I know in time things have a way of working out for the best!
Grace