Do I have a libel/slander Case? The things stated below were stated as fact and said to my co-workers

I was recently fired from my job at a Catholic School. I was fired because I told my boss I would not attend a meeting that was going to be 3 to 1 and I wanted representation at the meeting.
They came into my office anyway and tried to have the meeting. I was cornered in my office by 2 priest. When I tried to remove myself from the situation I was told to GET THE HELL OUT AND NEVER COME BACK! As I went back in to collect my things, I was told I needed Spiritual help because I had a dark soul and that I wrote an evil email and had called the Health Department on our caterer (neither which is true).
After I left they called the rest of the staff together to say I had been fired for being a liar and a conniver. That I manipulated the principal and did things behind her back.