i was making left turn, costo employee pushing the shopping carts approaching the intersection and hit the rear door of my van. it costs $4000+ to replace the door. Costco legal agent said it's not their fault, the employee didn't move, it was me hit the shopping carts. i argued if i hit the carts the dent should be at front side not rear side. they didn't agree. they also asked another costco employee who was not at the scene be the wittness said i hit the carts. i already filed claim to the insurance, don't know what else i can do to protect myself. thanks.