All of our products including games, expansions, Daybreak Cash, and All Access Membership time are non-refundable. Once the order is placed and the credit card is charged, the order cannot be canceled.  Please make sure you are purchasing the correct game, expansion pack, campaign, DLC, bundles, ingame items, or amount of Daybreak Cash, and have logged into the correct account prior to completing your purchase.

This issue is addressed in Section 5 of our Terms of Service found HERE:

If you feel that you were billed in error, please contact Customer Support so we can resolve any problems or concerns.