I Hate Scammers

My husband got a call yesterday and my son answered the phone, the scam artist on the phone said is this Mr........ My son said yes, this is me, then they said you have very good credit sir, are you sure you are Mr........my son said yes, the scammer said we can lower your interest rate on your credit card, I see that you pay all of your bills on time, that's great, just give me your credit card number and then my son said but I don't have a credit card....So the scammer hung up!