Purchased a Club Wyndham Access Cash-Sent Cancellation

I purchased in Oceanside Ca for a Wyndham Access. My reason was that he showed how being a Silver Elite would get me extra benefits for very low cost weeks with 45 or less days notice. I paid cash on Sunday the 6th and decided probably could do better with my cash on eBay or ? Sent the letter to the Las Vegas address Fed Ex on the 10th. I believe that should be sufficient but noticed some people returning the bag containing all of the membership books, etc.
The instructions I have do not mention anything besides a letter.

Purchased a Club Wyndham Access Cash-Sent Cancellation