They don't toss anything - they throw it in a spare parts bin. If they ditched it, then they owe you a new one even if they have to take it out of a package to give it to you. I really would let them know - perhaps they had someone helping out in the back who usually doesn't and that person wasn't well supervised.

You know, when you are paying for service, you have the right to expect it to be done right.

Corey agress with me - says the mechanics have been bombed with work and they have had some odd helpers the last few days because they have been so busy. They will be happy to make it right for ya!