iPod touch Dented replacement iPod Touch

Upon receiving a replacement iPod touch from an Authorized Service Center, I saw dirts on the sides and corner, and mild dent on upper left and lower right of the unit, I was still in the service center when I saw them so I immediately returned it to them(service center) and they accepted it. Bottomline, Apple gave a dented replacement. Now, the Authorized Service Center said that Apple doesn't want to replace the unit and still trying to get it replaced from Apple. It is still covered from Apple 1year Warranty. What can I do?

Thank you for your reply. Well technically, there is no Apple store/center in our country(Philippines) only Authorized Service Centers. So most probably is I can give Apple Singapore a call, where I think the Authorized Service Center talks to. I know replacements are refurbs and as far as I browsed online, they are good as new. But the replacement they gave me and have been returned has, as I've said, dirts and dents.