Aww cmon. People make mistakes. I even did that one time. My neighbor who drives an e90 came in for a top off of fluids....and I accidently dropped the coolant cap all the way to the bottom of the engine bay...and it squirmed its way to the bottom of the front bumper.
It took 30-45 minutes of getting it out....no techs there, me the manager, the SA, and the parts manager. It was horrible. I felt really bad. By luckily my neighbor was cool....she just sat on the couches and watched tv while drinking a coke.
I appologized a million and one times.....but yeah, nobody is perfect and they should appologize and try to make it right. It was their fault not yours.