I called the number back, recording; "Hi this is Lisa with Reward Resolutions, you recently visited one of our reward vendors and have won a $100 Visa gift card.  Press 1 to speak to a representative, press 2 to be placed on our Do Not Call list"

phone rang one, and then hung up. no message left.

This is a scam.
They will claim you won this voucher and a family savings guide. They will then ask for $3.89 processing fee and your credit card number & email address with the "promise" you will be emailed your $100 voucher redeemable at any major retail store. After they have your card number, you are a victim.

Got a call, rang once & hung up. No message left. Saw this info here and didn't call back.

Got a call on cell phone today and the hung up.