Florida has strong court cases (Johnson v. Davis and Raynor v. Wise Realty) that address Latent Defects and a Seller's obligation to disclose them. A Lawyer can advise you on what if any recourse you may have.
May I suggest that you cease any further repairs, carpet removal, renovations, etc. until you see the Lawyer.
Also, take some digital photos now while it is wet and moldy. Show the Photos to your Attorney.
Fred has given some good advice in my opinion and I wish you the best in resolving your problem.
Fred with the newest changes at Trulia the Thumbs up doesn't seem to have much value but you deserve one and I'm considering creating a few new profiles to give you a couple extra. ; ).
Thanks for your contributions.
That Dunes guy......