I won a trip to Hawaii, I gave them my credit card info but he call got disconnected when they were explains how to redeem my vacation. I've already been charged on my credit card account, what should I do?
Cancel the card immediately and let the card company know you've been scammed. They may be able to get your money back for you.
For future reference, never give some random caller your credit card information! Or any personal information, for that matter. If you didn't initiate the call, you have no guarantee the person is legitimate.