It came to our understanding that the contract we have from Royal Sunset Hotel contains many disadvantages that I could easily rent the first room myself through a rental firm that they recommended. I tried to sell the timeshare myself, but found out that all I owned was a worthless piece of paper.

they are so full of lies, here is another blacklist for Sunset Lagoon, all the lies and fraud needs to stop NOW.
http://www.timesharescam.com/timeshare-scam-mexico/sunset-lagoon-group-timeshare-12