I would never let a tuner who lied to me touch my car either... If you lied about which tune you sent him, why wouldn't you lie about what was wrong with the tune/car.
This is where you screwed yourself. Even if it were a mechanical issue, a lot of people arent going to believe you now....
This is where you screwed yourself. Even if it were a mechanical issue, a lot of people arent going to believe you now....