Got this email from Sallie Mae student loans, apparently I'm a Navient customer now

Say hello to NavientSM.

We're pleased to announce that starting October 13th you'll be a Navient customer. Your Department of Education loan(s) will be serviced by Navient – Department of Education Loan Servicing. This past spring we communicated to you that Sallie Mae became two separate and distinct companies—Sallie Mae and Navient. We did this in order to maximize our focus, expertise and serve you better. It's an exciting time here at Navient as we embark on this new journey with you in mind.

Interested to see how much my interest rate will go up now