Filing the lawsuit is easy - winning is hard. How to file: You have two choices. You can hire an attorney to file the lawsuit or you can learn how to do it yourself. Doing it yourself would mean a few hours in the law library, downloading a couple of forms, filling them out, taking them to the court for filing, then getting them served on the school. The serving part is easy once you find out who is the schools agent for service of process.
It may be that the lawsuit will immediately trigger a positive response. Your problems could be solved in a few days. But if not, you would have to decide whether to dismiss the lawsuit or pursue it. Pursuing it would involve either hiring an attorney or learning how to handle the litigation yourself. This part would require more than just a few hours in the law library. Think of it as a full time job for a couple of months.
Here's another option. Find a few dozen other people who are having the same problems as you. Pool your money and get an attorney to sue and see the process through the litigation maze.
Oh, wait. I just thought of another one. Find out whether others have sued the university for the same problems. Find out how the lawsuits are going, or were concluded. Get a copy of their pleadings from the court clerk's office. Get advice from the plaintiffs.
This answer must not be relied on as legal advice for the reasons posted here: http://mcgyverdisclaimer.blogspot.com . And I am not your attorney.