Again....if this is a federal loan, Naitonal Enterprise is not collecting for Sallie Mae but for you guarantor. Sallie Mae would have defaulted you to you guarantey agency. If the letters say they are collecting on behalf of Sallie Mae, you have a private loan, non governent one. Read the letters they sent you.
If this was a federal loan, unemployemnt deferments are not difficult to get by any means. A seperation form from your previous employer, unemployment check. If you were never employed you should have applied for economic deferment. If this was a private loan, Sallie Mae doesnt have to offer you unemployment deferments at all.
Federal loans by law charge you 24% in collection fees when you default.
Private loans generally come with a higher interest rate. And yes, they are very legal.