Originally Posted by
IAD_flyer
You are still somewhat far out to XMAS, not much to do other than to keep pushing, every few weeks. If you're very concerned make a reservation with a free cancellation at a comparable property now in case they don't provide a satisfactory resolution.
I'd do this, plus get in writing from Hyatt, that you would like for them to compensate at least partial, and/or cancellation fees for the alternate, if the hotel is not available by then..