It's a collections agency (or that's what it sounds like anyway).
They're calling for an unknown person - Jennifer Vanilla??
I've had this number 10-ish years; it's so annoying.
You can press 1 to indicate that you're not this person and then 3 to indicate that they have the wrong number, but it doesn't help. They still call back.
They're also calling from 256-270-2965 (last two numbers swapped).
At this point I'd almost prefer to pay off the person's debt just to get these people to stop calling me.