I'm not in the same boat but I understand that the maintenance fees @ Manhattan Club have become so high that many owners can no longer afford pay for it. You can't cancel a recorded deed, however you may be able to deed it back if you can't find a buyer. There's always another option and that is just walk away (which may or may not have a downside).
Another option may to book a desirable week and rent it out to cover expenses. Also, TUG does have a free timeshare giveaway Forum in case you wish to find a taker.
In any event, DO NOT pay anyone any upfront money to someone who claims they can cancel your deed. That is just a scam to lighten your wallet. They'll simply take your money and disappear forever.
Welcome to TUG and best of luck!
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