I understand how you feel but truthfully, it is no biggie

as long as the damage on the body alone, then there is really nothing you need to worry about. I just it is just some uneasy feeling, but really there is not whole lot you can do about.

you can always ask the dealer services department for some free services coupon or free oil change allowance. they might be happy to handle you that.

if you are really unhappy, you can alway rate them very low when the corporate calls you for rating. most of the car makers will survey about dealer after service is done. but rating them low will not help you much.

If i were you, i would just move on.
if i still can not fall asleep, then i would ask for free oil change for a year then move on:)