I'll be honest with you...I have issues with this story.
First of all, the school doesn't "allow" you to take the NCLEX, the board of nursing does. You register for the exam and they send you documents, some of which the school has to complete. This is what I would do if I were you:
1. Was a diploma/degree ever issued to you? If not, I would call your state senator or the governor's office. If you have paid your fees and passed all your exams, they CANNOT require you to attend the graduation ceremony (they may threaten, but that is a myth). I would not do this before going to the highest level of the college, be it the Dean, President, etc. If you cannot get anywhere, then call your state rep.
2. If you do #1 and they still will not issue you a diploma..I would get an attorney who I guarantee would do it for next to nothing. One letter from them and I bet you'll have it in your mail by the end of the week.
I am so sick and tired of these schools
taking money and then trying to act like they hold all the cards...they do, until you complete the program...after that they don't have a legal leg to stand on.