Complaint Review: Strayer University

I started Strayer in 2010 and complete in 2014. Upon completing my studies i was told I own money back due to a error done byStrayer Finanicial Aid . I was told I have to sign a promisory not agreeing to repay money> I explained I didnot have the money but told me I would not be able to graduate without  signing note. I signed the  not not I am getting pas due notice. I wrote the predisent of the college he passed me to some other dept. to resolve. I do not plan on attending Strayer to complete my Masters. I feel they make mistakes on purpose to charge intrest.