Post University Expelled from Graduate school without due cause and charged for a course I never took Waterbury, Connecticut

I was an graduate student at Post Univ with an "A" average and toward the end of a term I was hospitalized.  In addition I had enrolled in another course for the next term.  I was hospitalized for over a month and when I returned home I found out that I had been expelled because I had made two F's in the two courses.  I appealed by explaining that I was hospitalized for over a month and it was impossible for me attend class.  I only made the F's because I was incapacitated in the hospital.  According to school policy one of the legitimate reasons for an absence is hospitalization, however although I provided documentation that I was hospitalized my petition for reinstatment was denied.  Post did not honor their own policy.  Lastly I was charged 1,500 dollars for the course I was unable to attend because I was in the hospital and they have refused to refund or dismiss the charge.