Hi Sally,
If you log in to your account and click on the 'your holidays' tab, it should show up. If it still hasn't shown up, please enter your booking reference, departure date and postcode into the form. Hopefully that will work, and if not just let me know and I will contact a member of the team. Alternatively, if you have booked this holiday with a travel agent, it will not show on your JY account.
I can confirm that currently there are 11 spaces available for Mexico, Guatemala and Belize excluding the add-on, for the 8th February 2016. There are currently 6 available spaces for the Playa del Carmen Add-on.
Relating to Cuba - the Ernest Hemmingway excursion is the only optional excursion available to book with us. The other excursions mentioned on the website are only dealt with in resort. If you need any more information on these optional excursions, I am happy to help.
I hope you're looking forward to your travels.
Kindest regards
Monty