Just for posterity--and anyone who might read this in the present or future--
This is from the TUG advice section:
- Along with the letter, send a copy of the main page of the contract.
- Be sure you send your rescission letter using the exact form of mail/communication stated in the instructions - you may be required to FAX or mail your rescission - follow these instructions exactly.
- If you are required to mail your rescission, make sure it is postmarked within the required time and that you get a return receipt when it's delivered.
- If you are required to FAX your rescission, make sure you keep a copy of the FAX receipt to document the date and time.
- If the rescission instructions require you to send a FAX, you should also mail a copy of your rescission papers via a trackable mail delivery service with proof of delivery.
- Make copies of everything you send - don't send any original documents.
- Expect your salesperson to try and talk you out of it. Don't get embroiled in a long discussions, just keep politely repeating, "I'm not interested."
- You may be required to return the owner's guide or other materials you got as a new owner upon request.
Keep in mind, the LAW--the only thing that matters--is very specific on timeshare rescission and varies by state/country. I don't know your state, but it's easy to look up. The LAW specifies the rule (usually or always, would need state...) and stipulates when the clock starts, how many days you have and what qualifies as a legal response for cancelling the contract (usually the day you MAIL the rescission letter). Courts will uphold a document mailed by USPS (even if delayed) and may/may not uphold other forms of delivery (UPS, FedEx etc....). Follow the contract.
I would definitely follow-up as advised by the other posters.
Good luck