why wont my game show up anywhere

Please try to check your game in the order history in this following website : Microsoft account | Home just to make sure that the purchase was through your account. However, if the game is in the account, I suggest to remove your account and add it back.
In case the issue still persists, please contact our live support Contact us | Xbox Support

7day Trial codes are not recognized as Gold

- they wont Show up anywhere

- they wont enable you to use Gold exclusive offers

in General they are meant for using with the game they are bundled with, but they may work with different games too

Thank you for a quick reply but this is no longer accurate. Rocksteady games released a cheat code to allow the changing of skins before completing story mode.

multiplayerblog.mtv.com/.../free-batman-arkham-city-skin-cheat-code

[View:http://www.youtube.com/watch?v=RMk0wyI6pfY]

This cheat code definitely works and allows me to now use the free downloaded skin i found in the LIVE marketplace. But still the skin i paid for does not show up. Also the skins should show up outside of story mode before completion regardless of the cheat.

Im a dumbass. Downloaded a costume not a skin. Skins have to be bought as a package. btw $5 for one avatar skin? wow.

I have looked this up - it sounds like you can only select and use the skins if you have already beaten the game on Normal or Hard difficulty.