Repairing water damage starts with finding the source of the water intrusion and stopping it. If you think water may be getting in near the window, start by inspecting caulking and sealants around the window - the bottom edge is generally not sealed. Also check light fixtures. Look for caulking/sealants that are cracked, or that pull up away from the surrounding area. Until it stops raining, the best you may be able to do is cover a leaking area.
If you have extensive damage to the flooring, you might want to look for an independent service shop rather than a dealer. Dealers usually prioritize their work toward new sales, and can take a long time getting to repairs. Independent shops just do repair work and make money by getting trailers in and out more quickly.