I agree. They can say they are Sallie Mae if they are a collection agency trying to pick up the debt. This is usually the case, and I personally wouldn't be giving my info out to some trashy collection agency! If you ARE having financial issues then call them using their official number. If nothing else at least you are keeping them in the loop and sometimes they can even suggest options to help you out.
Got a call this morning from 302-283-4044, I looked it up and its from Delaware. I don't know anyone from there. If anyone has a clue who it may be please post. They didn't leave a message.