I would demand a new bumper. It will never come out exactly how the factory did it. If you have documentation of your request, show it to the sales manager. This is a big deal to me and I would not take delivery of the car. They ruined your msport bumper!
2013 335i M sport 6MT --Sapphire Black Metallic/Black Dakota, premium package, technology package, dynamic handling, black grilles, 5% tint--