I would guess to say "oh gee, it was an elderly person taken advantage of", but hey, i'm an elderly person and this screams scam.  I love these phone calls - I ask questions, interrupt to ask a second question, interrupt to ask the first question again.  if they haven't hung up by then - I put my phone that is on speaker phone about 10 feet away and yell questions at them, saying i'm multitasking or doing something else.  i'll tell them (don't ask) to hang on  a second and have a pretend conversation with someone, repeating , kinda, what the person on the phone says, ask them to repeat and then interrupt again, going back to my pretend convo..  if they're STILL on the line .... I'll just tell them "ok, love you, bye bye..."  oh, asking "WHAT?" a lot helps too.  it's a healthy, fun way to spend a couple a minutes and waste some jerk's time...