I finally called it back after getting 5 calls a day for the last 4 to 5 days and not even picking up.
So the answering machine mentioned something about eye care, as other postings here report, and then mentioned; "if you'd like to be on our Do Not Call list, please leave your name and number at the beep." I bugged off right away, cuz it just doesn't feel right. I think the answering machine is intentionally misleading and the number might actually be some $$$ number. I guess I'll see when I get my next bill.