Katrina...
I am so sorry... I know virtually nothing about Wish Trips, so I am no help to you. I feel badly something that is supposed to be such a magical thing has turned into a disaster for you. (((hugs))) Is there a way you can Google the information you need? Is there some sort of corporate entitiy involved that you can contact?
Being granted a Wish Trip should not put this sort of burden on your and your family... And I completely understand about needing new luggage for your situation.
D~