Did you check out the house b4 you agreed to rent it? If not, you might have a problem. A solution though, Involves naming a lawyer if you don't have or know one. I would go back to the landlord that it was rented "On false pretenses", and that by Federal Housing law, he is required to make the home habitable. If he wants to press things further, he can contact your attorney.......Fill in the blanks............. but you will be vacating within the week.
If you don't have an attorney, or pre-paid legal services, just try and BS him. Might work. If he calls your bluff, then go to Legal Services at your nearest courthouse.
Sorry for the Jack, just thought the guy needed some sort of legal advice. (Had 3 years of pre-legal b4 I switched majors, sorry)
Ray