I think you should read the contract you signed, as it should say something about the deal is not consumated. Human nature being what it is, "you'll always have one bad apple giving the rest of us a bad name".
I passed on several houses, until I bought a home. Everything happens for the best. One door closes and another opens up.
Don't give up!!!! I know your feeling slightly down, but there is always another home and this maybe a blessing in disguise.
__________________
"It doesn't cost "nuttin", to be nice". 
MOM
I just want to do the right thing! Uncle Joe, (my hero).