As you know, if anyone should know your vehical it should be the dealer.
Perhaps if you had gone to the parts counter at the dealer, they would have corrected the service department!
I took my car to the 5 minute lube type shop and as they changed my oil they also replaced the cabin air filter.
Believe you me, I was watching them like a hawk but they never screwed up anything and looked like they knew what they were doing. I was charged only for the filter as they were also doing the lube too.
An answer to your question, go back to the dealer and show them the work order and enjoy watching them try to come up with a good reason why they did not know that! :rolleyes:
Remember, the dealer should know more about the car but at any time you are not comfortable with one dealer just go to one you are comfortable with. If they screw up, in my experience, they are better at fixing the misstake than most other shops.
Stephen