Called me 3 times Sunday morning. When I called back it said "press 9 to be removed from our call list." I pressed 9, and they called back fifteen minutes later.

What the scammer really means is:

Press 1 to add your number to the "it is a live one" list we sell to other scammers.
Press 2 to yell at somebody who may not understand you.
Press 3 to verify you are a human, and answered your phone.
Press 4 if you enjoy getting unwanted phone calls.  We aim to please.
Press 5 if you have a dial-type phone instead of a pushbutton phone.
Press 6 to learn how to send us money by green dot or other untraceable means.
Press 7 if you want us to call you at 7 AM ... or, some other, inconvenient time.
Press 8 if you like the sound of that tone
Press 9 if you are still on the line.
Press 0 to hear this message again