How do I get them to stop?

got the call today from this number .. weird message about some last warning .. final call notice .. my father picked up and listened to the message the caller had put on it .. It also asked to press some number for verification ..
Did not click any numbers and disconnected phone.

CALLED TO MY CELL

press numbers

It was a recording that said "if you already received our letter regarding your credit card account press 3 to be removed from the call list.  If you did not receive our letter press 1 to talk about your account."  BS!!!  I bet they want to get your credit card info!  I pressed 3 to be removed and it hung up on me automatically.