If I were you, before I do anything else, I would check with a real estate attorney in your area. Sometimes they will give you a free consultation to see if you have a case. If the house is only 9 years old, it sounds like the water problem has been more than minor. You haven't been in for a year yet, so you may be able to put it all back on the previous owner. I don't think the agent was very professional either. If checking with the attorney doesn't help, come on back.