We have put in some measures to prevent unintended use of Gold in the game. For example, by adding prominent confirmation alert. You will receive alert messages when using the Gold and it can only take effect after your confirmation, which minimizes cases of unintended use.
Since this is a real-time multiplayer online game, any recall action will affect other players. Therefore, we are not able to recall or cancel any completed action. The refund of Gold to you means you will receive items for free, which is not fair to other players who have worked hard or used Gold to obtain items in the game.