I'd ask them nicely once or twice. If that doesn't work then switch into ********* mode and make a scene in front of as many people as possible. Make sure the owner or manager is there for good measure. If your story is true, they need to fix it.

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1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma