Gold paint is a difficult match and if it is metallic even more difficult even when relatively new. Adding to that problem is it is a ten year old paint job and no matter how you cared for it, there is a certain amount of fade involved.
While we all can appreciate your concerns, some of the solutions suggested are problematic at best. If you are not satisfied with the second attempt and write a check which you immediately cancel, in most states you are committing felony fraud. If you stop payment on a credit card, the credit card issuer will freeze the amount but there will be an investigation and the shop will have an opportunity to respond. If they are willing to try once again to match the color or contend it is "close enough" to be acceptable, you may or may not win that argument.