This is terribly non-consumer-friendly of Samsung. Maybe they only want to sell the pink phones.
@polly69: Head to the Benefits section of the Samsung Members app on your new phone, where you should be able to proceed with your claim.
Not really interested in personal opinion, I asked if there was a way to exchange them for a colour that matches the device I purchased.
The pantone colour chart for bronze has way less red in it. They are definitely pink