upon test driving my 2011 BMW me and Shawn discove...

upon test driving my 2011 BMW me and Shawn discovered the battery was dead. I agreed to buy the car only if he changed the battery. He agreed that a new battery had been install but in fact all they did was jump the old battery. two months later the battery wont hold a charge and both Shawn and Manager Kevin refuse to honer their word by installing a new battery. I am now stuck with the $300 fee for new battery and installation. STAY AWAY FROM THESE CROOKS if you value your heart earn money. They will try to pull scams like this.