Complaint Review: home first insurance

we noticed mold behind our wall in our home we bought from vanderbilt morgage back in 2014 i contacted the insurance company home first insurance and they sent out a adjuster  so he called himself didnt inspect a lot only pointed a moister meter at my walls half the time it wasnt on .. he sounded like he was here to help us get this resolved but i was wrong he went back and told insurance company the mold was from us leaving the window open and alowing rain to get into the house im sorry but who would do that first off let rain into there home well it must have been noah's flood because the mold is in my whole living room under the wood flooring all in my kichen under the wood flooring in there and all in th walls of my landary room ....it is from the roof leaking unto the walls from the compay that build the home puting huge screws into the ceiling and it leaked now i have toxic mold all in my walls and in the floor dont know what to do at this pint someone should fix this i cant have my kids living in this