Have you ever done OPT before for the level of study that you are completing? Have you applied for working outside the campus during your status as full time student for 20 hours a week? Have you kept all the time your status as F-1? Have you ever used your social security for work without permision? Those are some of the things that come to mind. I would wait and see what they say and talk about it with your school's international advisor.
The only thing that is that you may be able to do is to apply to another school for another degree such from undergrad to masters and so on. Let us know.