Who called from 6468427821

Anyone else who tried to call this number back get the voicemail service?

This is a personal cell number from a collector in the Sallie Mae Dept.

I've told them not to call me and to deal with me through writing from now on "cease & disorder" (legally we have this right-but need to mail them a letter to stop by law)
So now htey call from their pokets on their personal cell phone. Nothing but [***].

Call my number but left no message, after reading these notes, it sounds definitely a phishing scam. Number blocked.