I read your report with interest, being an ex-employee. It was the most unprofessional terrible employment experience I have had in 30 years. The employees in FA, Student Accounts, etc. don't really care what your GPA is.
Since Kaplan in my area fires over 60 employees a month (113% turnover in the first six months of 2010), I can only guess that they are doubling and tripling up on workload. That said, it still does not give an employee the right to ignore you or treat you poorly. I can only suggest that you contact Greg Marino, COO by mail - return receipt requested. (He's in the Fort Lauderdale office). You might also try Andy Rosen, President (New York). And don't forget to tell him that if you don't get what you need, you will be contacting an attorney: that's the only way to get their attention. Good luck!