Once a boss learned that I had bipolar the way that he treated me was similar. I took time off work to return to made up new policies. The treatment was condescending and rude. It was my highest paying job but I quit. The next job was much better and my boss was nice and compassionate. What you discuss is a felony I'm thinking. If you were really approached in a cruel and disparate manner you have a hell of a lawsuit. Will your physicians testify?
I agree with China be firm & turn on the heat. Good luck