Pima Medical Institute keeps requesting money....?

I went to Pima Medical Institute for medical coding and billing, and I have had nothing but problems. When I first started attending, the financial aid person went through everything with me, and got me the funding for the payment of my tuition, books and fees. On the account paper work, it showed that my schooling (all together with taxes and fees included) was $8,900 and then I requested a stipend, which added an aditional $3000 to my tuition costs. Now at first right after I requested the stipend, I asked her everything was taken care of, and if she had all of my paperwork in order, and she said yes, I asked this several times and I always got a yes. But I had a few problems with her losing my paperwork or needing me to sign things that I had already signed. Then, when I graduated, I got the shaft majorly, because they had promised me lifetime job placement, and I did get put in an extern site that was hiring (even though my extern supervisor said I did an a+ job) and when I brought this up to the school staff and externship coordinators, they told me that it was "job placement ISTANCE" meaning that they werent obligated to get me a job, or even an interview, only to help me look for job listings.....So now I was stuck looking for a job in a horrible economy, and trying to pay student loans. Then shortly after I graduated, the financial aid person contacted me and told me that I hadnt paid all my tuition, I was confused because she had said it was completely taken care of 8 months ago. So I asked for an itemized statement and I couldnt really understand it, so it didnt help much. But she insisted that I owed the school $2000, so I filled out my FAFSA and she took the 2000 out to pay what was allegedly left of my tuition. Now it is almost a year later, and she has written me a letter, claiming that she needs to take money out of what is left of my pell grant to pay MORE tuition. Does this make any sense to anyone else? This school is really screwing me over in every way possible. She has already had me take out around 11,000 dollars in federal student aid, to pay tuition on an $8000 program. And I feel that they lied to me, and continue to do so. But I have no one to help me figure it out. I definitely cannot afford a lawyer, and I have tried all the schools staff for questions regarding all my issues, and they all shuffle me around or lie to me. What should I do?