Hello,
firstly I presume you did not book the villa from this site? To complain you can try the Better Business Bureau but it is a bit of a waste of time as it has little or no power. To complain at the lack of alarms (they are a legal requirement if other features such as a pool safety fence are not in place) go to the Dept of Business and Professional Regulation in Florida http://www.myfloridalicense.com. You can also check if the property is licensed for rental (doubtful if no pool safety features were in place). Next time book through a reputable site, take recommendations and do not be frightened to pay a little extra for quality. There are some amazing homes for rent on this very site. Good luck.