My reservation was also cancelled involuntarily. I suspect the hotel was known for some time that they wouldn't be open yet was taking reservations (GREED!!). I've written to Hilton but don't expect a response (I requested that my Hilton Honors account be closed). Now I'm scrambling for a hotel. The reservations manager suggested another Hilton property - HELL NO!! There's not much available. Any decent hotel that has rooms will run you $400+. This will be my last time travelling to San Juan.
There are many hotels having problems due to the hurricane, and lack of power. Have you checked Couryard Marriott in Isla Verde? They have stayed open almost all the time. There is also an emerging new group of small hotels.
Get an answer from Embassy Suites by Hilton San Juan Hotel & Casino staff and past guests.