These are the same people who are running the payday loan scam. They are actually not in the U.S.
They have a variety of numbers they are supposedly calling from but they are actually phoney. Do not talk to them! Hang up and block them if possible. They have been calling me for one thing or another for months. First it was a loan and now it's the bladder mesh. If you keep ignoring them they do go away. I was crazy enough to let my husband talk to them and now they keep calling. I think they are blocked on all numbers now.