Can I do anything about this situation? Any legal action?

I live in florida, working for an independent rep for 5 yrs, my 3 weeks of vacation came up, we had a major disagreement about it. I almost left, he told me to come in the next day and we will talk about it. I came in, he did not address the situation until 4:55pm. He had me come into his office, only to produce a letter of probation stating I was going to be on probation for 6 mo, no raise, no bonus etc. until after I completed the probation terms, of which stated I MUST TAKE ANGER MANAGEMENT classes twice a week. I had been with this man 5 yrs and had been promised several things of which NEVER came true. I completed an office manual right before all this happened, his wife came in to learn first hand step by step, the manual had to be that detailed. Then after I was let go, he hired his wife's old assistant right away.