You should NOT be at the mercy of an inept, rude local dealer, Holden. I handle customer complaints for a living, and I can tell you that a rational person with a legitimate beef gets a lot of attention from me. Your car seat situation is absurd. My gosh, it looks like they put the seat on the wrong side of the car! How crazy.
Jump right over the dealer and contact Pontiac directly. Here's the info:
National Office: Pontiac
Customer Assistance Division
P.O. Box 436008
Mail Code 483-631-840
Pontiac, MI 48343-6008
1-800-762-2737
www.pontiac.com
I had an issue years ago with my wife's pontiac. We were looking at an expensive, non-warranty repair that I was certain was caused by dealer negligence. The dealer dug in his heels, so I called Pontiac and presented the situation as logically and calmly as I could. We ended up splitting parts and labor, which seemed fair to me.
Call Pontiac. Dealers hate being in trouble, and though you may not win any friends by ratting on them, they'll have to fix your seat.