We understand you are requesting a refund for a game that does not play smoothly.
We regret to inform you that we are unable to provide a refund at this time. All purchases on Xbox Live are final and non-refundable.
However, we have a recommendation to fix common issues with downloadable contents.
What we can suggest is to follow the troubleshooting steps on how to resolve issues with connection speed or frequent disconnection found at: http://support.xbox.com/en-US/xbox-live/connecting/performance
You can also follow the troubleshooting steps "Can’t join an online game or party, or find players for an online game" found on this link: http://support.xbox.com/en-US/games/xbox-games/game-play-errors
Thank you for visiting www.xbox.com and allowing us to assist you. Please be sure to check back often for new information and exciting news about upcoming products
Xbox Live Support Team