Digital Downloads Xbox 360?

Well its pretty unfortunate for you, however I have some great news.

You can't re-use digital codes, once it's redeemed you can't redeem it again.
But all the items you download is saved on the hard drive so you can use everything you have in your xbox like, DLC, Avatar clothes, etc. For every account you have on Xbox.

However, Microsoft points and xbox live gold, only saves on the account you redeem it on, so you can only use it on the account you redeemed it in.

But in your case, you can use the DLC you downloaded from another account, to use it for all other accounts, since its DLC. So great news.

Now I can give you some examples, so you're more secure, since you're a new xbox member.

Example: If you buy Minecraft in your other account, called Example1.
Then you can play Minecraft on the other account as well, Example2.
Since it saved on the hard drive

Hope this helps, I kinda got more in depth.

No, you used the code, so you can't re-use it.

HOWEVER, Games and some DLC works on all accounts on a system.

You can use help from the store from where you bought your xbox 360

To add to Nilly, once you redeem the game, the game is tied to your account. I believe that nothing could be done to make changes to that but I would try to contact Xbox about the issue and beg them to make the changes. >>> http://www.xbox.com/....xbox.com/ seek support