Don't worry, you won’t be charged for content you’ve already purchased.
For information about how to download content you‘ve already purchased, see View your Xbox Live download history on your computer or Xbox 360 console.
If there are any service alerts, wait a while and then try again.
Solution 2: Make sure you can connect to Xbox Live Solution 4: Delete and reinstall the game or app You might be able to correct problems related to downloading a game or app update by deleting the game or app from your console and then installing it again.
You'll be prompted to install available updates when you start the game or app.
You must be connected to Xbox Live to update a game or app.
You see the following message when you start a game or an app: Xbox game and app updates download to your Xbox console.
If you’ve installed the game or app on your hard drive, you’ll have to install it again after you delete it.If you purchased the game or app from Xbox Live, you’ll also have to download it again after you delete it.