1) Take a deep breath. This is not the end of the world.
2) Ignore all the advice about lawyering up, going to small claims court, calling the Better Business Bureau for Boomers. None of that is going do anything but waste your time and perhaps cost even more money.
3) Realize that you have precisely two options: a) Pay for the timeshare and use it; or b) stop paying, default on the contract and let them foreclose.
If you decide to default, kiss all the money you have already spent goodbye. And then stop taking their calls and throw their letters away. The credit hit should be relatively minor. (No guarantees. But nobody yet has posted "I defaulted on my timeshare and now my life is RUINED!")
I disagree with much of what you just wrote.
To suggest that there "are" (with 100% certainty) only two options paying or not paying, is logically incorrect. Of course, there are a near infinite set of possible outcomes. If you're saying these are the most likely outcomes in your opinion, that would be OK. Stating your opinion is OK. But to say with 100% certainty that these are your only courses of actions is not OK.
I also question your saying, "The credit hit should be relatively minor. (No guarantees. But nobody yet has posted "I defaulted on my timeshare and now my life is RUINED!")".
I've actually given that a good bit of thought. Yes, many people have been given that advice on TUG and have no doubt done that. But would they thereafter come back to confront those people who provided that advice? I think not. It would do them no good and they would have likely been confronted by their attorney who said to them, "You actually followed the legal advice of an anonymous Internet poster on a message board? That's where you went for legal advice???!!!" So they would have recognized how stupid they were to do so, and would likely blame themselves, and not the anonymous Internet posters.
Finally, I absolutely despise "self fulfilling prophecies". Such and such will do you no good. It can't possibly lead to a positive outcome. So you do something or don't do something based on that prediction and lo and behold, you didn't get a positive outcome.
So you don't ask that girl out because you predict she'd never go out with you and lo and behold, she doesn't.
So you don't apply for admission to that college because you predict you won't get in, and lo and behold, you don't.
So you don't study for that math test because you know you'll fail, and lo and behold, you fail.
I would, at the very least, do as I suggested in my last post:
"
Maybe first send a letter to the District Manager of that Wyndham district, tell him what you were told, say you're still waiting to be contacted by the financial firm's rep, and ask why it's taking so long. And then see how (or if) he responds."