Unhappy buyer .What to do ???

Used race parts are just that,, USED If he wanted new That's what he should of bought. I can't see even if set up wrong and the pattern was off,, other than being noisey it's a race car. If the back lash is in limits I see no problem.Now if the heal or toe is way off that it may break the teeth,,,It would have happened to you. Just a thought...