LKQ Corporation Stole my money Montgomery AL

 I bought an engine from Lkq on May 4, 2017, it was delivered a week later(should have been 3 days) I paid them cash $1276, I called back and asked for a return and refund on May 22nd, they keep telling me my money should have already been refunded and the driver still hasn't shown up. Today is June 20th!!!!! Do not order anything from these people.Oh did I forget to mention that the driver pocketed $25 of my money?? Yeah, my invoice was altered when he left. Im suing these people. Im a single mom of three kids and I can't believe anybody would steal from me like this.