I need advice .. It seems dealer wanted to take off my parts

TE37_370z

hi!!! members,
i just brought my 370z '10 couple of weeks ago. the first day that i picked up my car, i did check interior and exterior roughly. Everythings seem to be fine juat like other brand new car with 45 miles (dealer pick up at other dealership).
i took my car back to my dealer to swift tires and rims. Its took almost 4.5 hours to do (thats so insane). i had own 350z and it did not took this long.
since then my car started to acting wired unbalance, heart wind sound from the outside than usual especially from the rear. side skirt gotten loose, i looked underneath most of them seem like someone had taken them off (from my experience about car, most of the time new car/parts that came from factory such as bolts shouldn't be or just a bit of scratch). from bolts that i saw (didn't lay a finger on parts/bolts at all), seem like some body untied them coz they are marks on bolts.

any one who can help or may share some opinions would be appreciate. its just frustrated.

thank you guys.