Did you notice the damage before you took off with the car from the dealer? (i.e. noticed it right away)
Did you show them & bring it to their attention right away too?
If so....it should be on them & you should've made a big fuss at that point.
Highly doubtful they'll be checking "camera footage" after the point & you've taken the van and you're back home.
You're going to have to press the service manager to get it fixed though.
