Global auto Sales cars that the engine has fluw out on the first day of transaction and no returning my money back Columbus Ohio

 I went and buy  a Cadillac catera  last week the same day the car blew the head gasket call the owner of dealer they don't want to returned my money back they told me that I lost my money and that if they tried to fix the car I have to paid them for it plus the want to keep the car for a week supoly to fix it when I ask for another vehicle I was told that I supposed to take the car to my mechanic before buying the car. I  they told me that they have more cars for sale I took another car to my mechanic and that car as well wasn't good either was a rippoff. I'm furious because this people said that there is not a law that regulated this time of thief   Here I'm with out a car and my money is gone help please the name of the dealer is globalauto.