Babs:

If there are no rooms, there are no rooms. Even Radisson can't make a room appear if it is not available. If any room is available at any rate, you should make Radisson book it for you at no additional cost. Otherwise, you and your TA just need to figure out how to get your pound of flesh. Radisson probably has all sorts of caveats in their contract about "similar properties." However, they should have reserved a room for you, especially if they have money from you for the hotel.

You might also agree to Le Tahaa but request Radisson to keep checking to see if there are any last minute cancellations at any of the Bora Bora properties.

I'm sure you will get more advice here.

Good luck and keep us informed on what you and your TA get worked out.