It's not a matter of hoping they will honor your right of rescission. They have no choice. But today is Sunday. The post office is closed. So write your letter. There are plenty of templates here and elsewhere. Make a copy of the signature page of the contract for ID purposes. Send it USPS Certified w/return receipt. The address is in Las Vegas, but not at the casino. If they put your down payment on their card, you'll want to keep it open until it's refunded, then cancel it.
Glad you found us in time to save yourself many thou$and$! Timeshares are a great way to travel, but are a lousy investment.
Enjoy your holiday!
Jim
Hey Jim I just want to know it this is the right address because it is addressed in Rio Las vegas. Should I use the one on top where it says 3700 west flamingo road? Because thats where we signed the contract their office too. Thank you!