I keep getting the same thing... I called them back YOU HAVE TO YELL NO YOU NEED TO SCREAM REALLY LOUD AND TELL THEM TO STOP. While screaming ask for a supervisor.
Then even asked me for my social security number. I told them I wasn't going to give anyone my SS#. GOOD LORD !!!
It started last year they stopped for about 6 months but are back at it.
Someone used my cell number for a student load.
"Romona Hill" if your out there PAY BACK YOUR STUDENT LOAN IT'S THE RIGHT THING TO DO!!!

Hope it works for you. :)