You would definitely know if that part was missing, I have the same set and know exactly what you are talking about.

It's up to you if you leave neg or neutral. If you feel misled and lied to then leave neg, if you're undecided, leave neutral. Even neutral feedback will affect their score so it will make an impact.

I doubt the seller would call you to harass you, they would most likely be embarrassed and know they are in the wrong.