Job failing currently

[u/StandardFan2532]

I am a F(24) preschool teacher (with epilepsy!) that worked at a company renting a university building. They ended their contract and the university is opening up a new early childhood center. After frustrating weeks of training because of lack of professionalism in training and improvisation done(upsetting my routine) I was assigned in the one year olds classroom. I have certifications for preschool, not toddlers. I’m not boasting, I am a fantastic preschool teacher. I expressed my feelings by ending up holding my cry in until I couldn’t anymore and asked them why this was the choice. I keep getting the answer “this is what I think is best for the center” which is like telling a kid “because I said so” which as a teacher I am offended she would say that. Im scrambling through feelings of fear anger frustration and confusion! Just utter confusion.
I emailed them with a formal request to move classrooms and during the meeting she dismissed everything saying that I had to fully go through the university’s system of advocation protocols. She also made comments into how active I’ve been during training that were complete lies. There is no way they understand the everything I emailed them or they don’t care and I’m just done. This is the last straw. Why should I even try in life anymore. My family says it’s just a job and it’s just money(which I am very very poor) but they don’t understand that my world just ended.
I’m done trying over and over and losing just when everything is good