You are all awesome!! Thanks for all the advice. I am going to rescind first thing tomorrow morning. They gave me an "Election to Cancel the Sale of a Time-Share interest" paper. It has the Wyndham address in Las Vegas and it says "I hereby elect to cancel my purchase of the time-share interest in the above named time-share plan". It shows the time-share plan as Oceanside Pier Resort.
It has 2 signature lines and a box for the date. This should be good enough to rescind, correct?
Yep. Certified Mail and you are all set.