Kaplan University ripping me in financial aid payments Boca Raton, Florida

I started with Kaplan University back in January 2009 and took two quaters at Kaplan University however on my third quater I wanted to take a break due to illness and being under alot of finanical stress, working, studying and trying to make ends meet. I called Kaplan to speak to my student advisor and never actually spoke to her but to someone that told me I either take my classess or I would have to face the consequences.  I told her I physical could not juggle everything, work, studying and the physical and mental stress I was having during that period.  I got fustrated and just stopped taking my classes about 4 months latter in 2010 I got a bill form the Department of ?????? stating that I owed them $8000.00 dollars.  I contacted them in October 2011, while at my job and some representative from finanical aid at Kaplan put me intouch with this person form Department of Education in Kentucky or Virginia whome was very rude and was told that I would have to pay 300.00 a month and pay my student loan.  When I signed up with Kaplan I was told that since i earn under 18,000.00.  My financial aid would be covered.  Kaplan is so eager to get you signed up and hurry you on your merry way that when issue occure like this it is fustrating.  Now I am being told that they are going to garnish all my income tax and someway or another get their money.  I agree I do may have to pay some back but I think that for 7 hours of classes I was charged $13,000.00.