calls then hangs up

They CLAIM to be a credit card company that can reduce my rate to 6%. When I have to press 9 to talk to a rep. When I follow the simple directions I ask a simple question of them, " How did you get my number and how does this work?" The next thing I hear is the rattling of the phone and a dial tone. I am guessing they are not training their employees to handle the simple questions.

Press 9 and ask what company they are and they hang up. The first word from the person that answers is "what is your credit card number"
this is an idenity theft outfit.

Called today, I didn't answer. Did not leave message.

Called - no message left.