Welcome to cruise-chat.
We are not a place that is staffed continuously, and we are just a chat forum with no official ties to any cruise line. However, I researched your question and according to the Royal Caribbean website, if you call (888)724-SHIP (7447) they can help you reach the Radiance Of The Seas. From outside the U.S. call (732) 335-3285. The cost is $7.95 USD a minute.