USA Benfits I got a postcard about an unclaimed reward of a $100.00 dollars gift card good at Wal-Mart or Target and I contacted the number on the card which was 855-560-4872. I gave someone named Steve my claim Pheonix, Arizona

I got a card in the mail about an unclaimed reward, of $100.00 gift savings good at Wal-Mart or Target,  I called the number 855-560-4872.  I gave them  the claim number, and the person who answered the phone, said his name was John and that I have to pay a postage fee of $6.95 to activate the card when it arrives.  I asked where they were located.  He said Pheonix, Az. and they have been in business for 7 years. I said that I was not comfortable giving my credit card number on the phone, and he was insisting to do so... I asked for the name and website and it was USA Benefits.com....so I told him I would call back after I checked it out and he ended up hanging up on me.  Seems like a scam to me...