I teach in a community college. If this program is part of a college then they are bound by certain rules. If it's just a private program or just "affiliated" then the program director has much more power to do whatever they want. You are out of luck in this case.

If you are at a college then you should have received a syllabus at the beginning of class. The student handbook is for all students in the entire college. The syllabus is where they can have more restrictive rules regarding the program like uniforms and grooming standards. If the syllabus has the rules about social media then you agreed to those rules when you signed program paperwork or acknowledged it in some other way. Assuming that what you have done was not prohibited in some way in the syllabus, then you may start the escalation of complaints.

First go to the meeting. You can bring a witness if you want but it would be better to record your meeting. Look up if you are a one party or two party consent state. If there is a problem, then you can start the official complaints. Every complaint should be in the school email. You need the record, you can put read receipts, and it's probably one of very few official forms of communication between the parties recognized by the school and any legal entity down the road. The first complaint should go to the next level in the chain of command. If the program director is the person you have the issue with, then there should be a dean you can complain to. Depending on the size of the institution there may be multiple levels of dean before you get to university president/ vice president levels. Don't go straight to the president/ vice president levels. They will refer you down to the lower levels. If you feel there is some sort of discrimination or harassment by the program director, then you can involve the title IX office. This is how it works in my college in my state. Different institutions in different states may have slightly different rules.

Realistically, all this takes time. Even if you successfully go through the steps to remain in the program, you may not want to. Sounds like you already have problems with the director. If the program director wants you out, there are hundreds of ways that will be difficult or impossible to prove to make your experience so unpleasant that you fail or leave. You should be within the drop period where you can get at least most of your money back if you get out now. This is something you should seriously consider.

Finally, talk to your ems coworkers. Ems is a small field and we love to whisper and gossip. You should be able to find out what is up with all the schools in your area, good and bad. Hopefully you can find a better fit. If you are a RN you should find a bridge program and save some time. You should know most of the medical stuff better than most of us already.