Call blocker is your best bet. Not perfect though, they might call you from a different number. Don't pick up on calls you do not recognize. You might want to send them a cease and desist order. They have them on templates on the internet. Send it certified mail return request.
https://www.salliemae.com/
Mail correspondence to:
Sallie Mae-Department of Education Loan Services
P.O. Box 9635
Wilkes-Barre, PA 18773-9635
Phone number
Important account update:
We are splitting into two separate companies. In order to best serve your needs, please select the appropriate number below:
I am a Sallie Mae customer:
800-472-5543
I am a Navient customer:
888-272-5543
I am not sure:
888-272-5543
Email Address
[email protected]