Oh boy, this sounds oh so familar, same thing happened to me last year at my local dealership, one mint pescara damaged ,then they tried to "repair" it by matter of respray, but as we know there isnt an accurate colour available to respray, so managed to have a chat with the service manager and got a brand new alloy and kept the old one.
took 3 weeks to get the wheel after chasing them 4 times!!!.
Stick with it. They will resolve it. They wouldnt want the bad publicity.