Legal help regarding financial aid?

I have a BBA in MIS. 2 years after I graduated I decided to get a certification in Web Development @ the local Community College (CC). I completed the FAFSA & indicated I already had a degree.

I was awarded financial aid. A year later I applied 4 work study. I mentioned the fact that I used to work in the Business Office at the university I graduated from. A financial aid counselor for the CC then told me that I wasn't eligible for work study because I already had a degree and I shouldn't have received financial aid. She then told me I had to pay back the money to the CC.

I didn't have money at the time. I withdrew from classes and I didn't pay them. Now 6 years later I receive a letter from an attorney b/c the CC referred my acct to them.

I need to know if I'm liable. I didn't lie on my application...the CC made a mistake that I wasn't aware of. Should I get a lawyer?

Someone, please help.