Landlord/mold/lease - advice please?

My girlfriend and I moved into an appartment 4/9/09. Our landlord stated he would put installing new flooring in our bathroom. After numerous calls on getting it installed he finally had someone do it 4 months later. The installers found that the wood flooring was starting to rot from us taking showers and the floor having some water on it. We had a 6 month lease and about 2 weeks after he decided to fix the flooring we started packing up some things that we didn't need to take to storage and found that there was a leak that was coming from the bathroom. We notified the landlord every week for several weeks. About 2 weeks ago after we had decided to resign our lease he sent 2 Mr. Fixits out to our house who said they couldn't fix it. He then called a big company to come out and they determine what was causing the leak and found that when they did the flooring they never sealed the connections and most of them were leaking. The ceiling was so wet that most of it came down on my belongings. I don't have renters insurance (only 21 didn't really see the need) and I'm not even upset about the belongings. However im continously sick as is my girlfriend. There is mold in bottom corners of our room, in window sils, and in the closet where the water was leaking. The plumber had even said infront of our landlord when he came out to fix it that he would need to replace off the drywall. We have called and left messages for our landlord and haven't been called back. What legal rights do I have? What steps should I take? I'm not after money, just out of the house (have a 6 month lease) and my rent and sec. Deposit back. Thank you in advance