Said they were from Sallie Mae... I didn't take out any loans. O_o

Called, left no message. Called back. They were vague and couldn't explain the numerous calls.

Bill collection agency. They will pretend to be other companies or people as they attempt to "secretly" collect information about a bill dodger. I called them back after a week of random calls and set them straight. Don't give them any of YOUR personal information, just tell them the person does not live/work there and you wish not to be bothered further.

bill collector

Yes I just received a call from this number and they advised me that they were from the Special Olympics and they wanted a donation and they would take a credit card over the phone!  Now that is low! I called back the number and then I was told they made a mistake!! What???  Mistake???They would tell me who they were and hung up on me.