I’m sorry you thought you were buying something the school was not selling. Donations are just that—donations, not some quid pro quo for “promises.”
If anyone else is reading here thinking that their donations entitle them to something from the school other than good will, please leave those ideas at the door as you are sure to be disappointed.
It sounds like this school is not a good fit for your/child’s expectations and may be time to move on. There is no reason to stay with a school that is not providing what your child needs.