"Student Loan Relief Center. Your student loan has been referred for a reduction of payments" Spam robocall, no I don't have any student loans so it's pure spam cold calling, of course ignoring robocall and DNC rules.
You can assign multiple numbers to one contact, and block the contact. I have a contact called "Do Not Answer" (this helps to keeps my kids from answering then giving me the phone) I have multiple numbers assigned to this contact. they all get blocked.