I think it's important to find out how your wc works. It sounds like she lives in the states, not in Mexico, correct? As a wc that works in multiple locations I can understand how she doesn't understand how everything works every where, but it's also important for her to tell you how she plans to get that information for you. You will need to be patient when waiting for answers if she has to reach out to Mexico. Their culture is completely different than ours, most don't even own computers, so many times you are waiting for a vendor to go to an internet bar and check their e-mail.
I've found that the quickest way to coordinate a wedding in a new location is to spend a lot of time defining exactly what you want, and then send your coordinator there for a week. In that week they should be able to finalize your plans.
Good luck.