Called. No voicemail.

A MALE CALLED ON APRIL 13, 2015, AND SAID I HAD WON A $50 GIFT CARD!  AND THEN ADDED THAT I WOULD GET $250 IN GIFT CARDS.  STARTED ASKING ME WHAT CREDIT CARD THAT I USED THE MOST, MY AGE, AND THEN WANTED TO KNOW HOW MUCH INCOME I HAD A MONTH.  WHEN I CHOSE NOT TO ANSWER THE LAST QUESTION, HE GOT QUITE AGGRESSIVE.  WHEN I SAID THAT MY FAMILY MEMBERS DIDN'T KNOW MY MONTHLY INCOME, WHY WOULD I TELL A STRANGER . . . HE HUNG UP ON ME!  AFTER ALL, I WASN'T APPLYING FOR ANY TYPE OF CREDIT . . . WHY WOULD HE NEED TO KNOW THIS TYPE OF INFORMATION.  I ASSUME THAT I WON'T BE RECEIVING ANY GIFT CARDS!

Someone called from this number asking for my age and about my income and said that they were sending me our gift cards of up to 250.00..then hung up....I am worried about what kinda a scam this is
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