Welcome to the Club. Look up Sheamo that posted earlier in this thread, there is a group still trying to get their money back and sheamo is part of that group.
You will get NO help from the Krystal or whatever rental agency they've come up with in this scam. It is a scam, I am a victim too. You are way past any rescind clause or cancelling of the contract.
Like you I waited for the rentals to come in, not one inquiry, not one phone call. They took my money and gave me the finger and hid behind their border knowing that there is nothin' I can do about it. So, use it or trade it early and get 2 for 1, if you still have it. The beach is really nice. You can try to rent it, there won't be much profit. The crooks at Krystal will undercut your price and there is no way to compete with them. They even throw in the all-inclusive, and again, you're screwed.
It took 2 long years to get the pit out of my stomach, it did pass and I have rented some weeks out and now only have a couple left to go. My wife and I have stayed there and can enjoy ourselves most of the time, I still flip off anyone in a suit that's looking out the sales room windows as I walk the pool area and I tell anyone on the "tour", to get away just as fast as they can and that they are crooks and thieves in the sales den. Sorry, I must have missed you.
Rental help if you're interested. The Spring Breakers from any College, the Krystal is 1 of 3 official Spring Break Destinations in Cancun, too late this year, good luck next year.
TacoTerry