Caller-id showed NATL BANKCARD.

So I picked-up the phone and answered national bank card.

Person calling (American sounding - how shocking is that), asked.  "is this (my business name)?"

No I answered.  This is national bank card how can I help you?

He hung-up.  Guess he didn't need a bank card today!   ;-)

it seems the more I report unwanted phone calls, the more unwanted phone calls I get.  Shame, shame!  Double SPAM.