Fl as is rental laws?

i live in Massachusetts and i had planed to move to davenport, fl i was told the house needed 2 to 3 hundred dollars in light repairs. i was told the roof had a small leak and the wall inside with water damage needed to be repaired, and the last tenants left the place dirty and it smelled so it would need to be cleaned before i could move in. i was sent an as is lease by email i signed it and faxed it back. i put 2 months rent and security deposit. i never got his signature on the lease, and i sent him an email to let him know when i would be at the house. I arrived to find a house that was beyond condemned. the roof needed to be replaced, windows were broken out, the ceilings, and walls were falling down, the floors were rotten and i thought i was going to fall through, and the house was being held off the ground with cement blocks. they were not secured to the house at all and there were no support beams under the home to support the floors. and the landlord was no where to be found. i called him and he said he was on vacation and would be back in town the fallowing week. i asked if he had been to the house recently to see the condition of the house. he told me he had and when i told him everything that needed to be done he made light of it telling me to half *** the repairs with plexiglass and plywood. i demanded my money back. first he told me he would return the money when he got back into town. that week came and went so i emailed him again and he told me he didn't have to give me anything back because i backed out of the rental agreement. can he do this even though he flat out lied to me about the condition of the house and he never signed the copy of the lease i have or wasn't there to give me the keys and hand over possession of the house?