I purchased a Wyndham timeshare on June 24,2010
I did the math on July 26 and found it was going to cost considerably more using Wyndham.
I had no idea what I was signing but I took the salesmans word as to what it said.
I hate to be the bearer of bad tidings, but for better or worse, you now own this timeshare. Nevada's recission period is five days---so, you had until June 29th to cancel the deal. After that, it becomes binding. It is true that the Wyndham sales staff stretch the truth, sometimes well beyond the breaking point. But, again for better or worse, the paperwork you sign also states clearly that verbal assurances can't be counted upon, and that only the written contract is enforceable.
You can try to get out of the contract by suing for deceptive sales practices, but this isn't Wyndham's first rodeo, and I'm guessing your chances of prevailing are somewhere between slim and none. You can also try to deed it back to them in lieu of foreclosure, but they might not take it, and if they do, you will lose all the money you've put into it up to this point---depending on whether you financed or paid cash, this could be relatively small, or a substantial sum. You can try to sell it, but you will be lucky to get ten cents on the dollar, and if you financed, you certainly won't get enough to pay off the loan.
You will also be contacted by folks who "for a small up front fee" will promise to void your contract for you. I'm guessing some already have. DO NOT FALL FOR THIS. This is almost certainly just another scam---just like the original sales pitch.
I wish I had better news for you, but signing a contract without understanding it, *and* not going back over it in a timely manner (within your rescission period) is at some level your own fault. Hopefully, this wasn't too expensive a lesson.
The good news is---you are not alone. Many of the Wyndham owners here have purchased from the developer in similar circumstances, and they have learn to get good use and value out of their ownerships.
Edited to add: I went back over your posts from earlier this month, and see that this isn't the first time you've heard this advice. I know you're upset, and you just want out. But, there almost certainly is no getting out. If Wyndham won't voluntarily accept a deedback in lieu of foreclosure, you're not going to be able to force them. It's time to make the best of it.