Exploria Resorts - is it a scam?

We were duped on New Year's Eve with a pop up screen on the computer that we were the 1, 000, 000 visitors to a site and had won $3, 000 worth of vacation with SBR and took up their offer of 5 nights Orlando, 1 week's car hire, 3 nights Daytona, cruise to Bahamas, etc. etc. We paid $898 extra via credit card. This morning we have read all the scam reports so have tried to cancel and block the payment. Payment has gone through and no one available on phone because it's New Year's Day. However, on all these reports I have read most are from people who cancelled. I have not seen anything from anyone who went ahead with the offer. Can anyone tell me what it is actually like and what extra payments are involved when you get to Orlando?