Okay, I don't know that much about this topic but let me see if I can think of something. First, could you call the people that you sent the form and ask them what is going on? They should have answered already. When I went to UCM my friends that stayed in colegio mayores were not very happy, but maybe things have change. You can rent a room, it is cheap and if you don't like it you can leave. I suppose you speak spanish so go to
http://www.segundamano.com and you will find tons of places. I cannot think about anything else right now.
Buena suerte