Kymco ships the scoot with the parts. Many dealers pull that one. I would find a new dealer as you already know his "character".
Perhaps letting him know you are wise to his game may salvage a future relationship there.. Many times the mechanic that un crates/assembles the scoot will "toss" the parts on his bench. His boss is usually aware of this tho.
Bad start for a new dealer. (new to you) MOST of the forum members report their dealers installing these parts at no charge for a "thank you" of sorts. Bring a lap top, and show him your thread! That may keep him on his toes...