Severe diaper rash from daycare

Jamie
My two year old had diarrhea for a few days last week...today it must have return because her daycare called me at the end of the day and told me that "her butt is red because she had bad diarrhea 4 times". She went there at 8 and stayed until 4. I brought my baby home and took off her diaper and she was red everywhere that her diaper touched and has several open sores. Now I'm livid!!! How in the hell does this happen if she is supposed to be changed every two hours and more often if she poops? The girl who teaches her class often sends her home with feted poop on her butt or smelling like strong pee. I feel like yanking her ass up right now! What should I do? She is seeing her pediatrician tomorrow morning first thing and won't be going back up daycare any time soon. I'm so friggin pissed...someone tell me that I'm not wrong...