If you feel that strongly about it, surely you could contest it with your CC and explain them the situation. One should NEVER blindly accept & believe the agents that work there. Like one mentioned, they deal with hundreds of cars, and the probability of them mixing up information like this is quite high. Please also note I'm not blaming you for the error. But from reading your post, I feel like you might not have that strong of a case here. Gary could probably help you out a bit here though