Yall need to relax. Bugs happen in video games, it's possible that they cannot track who has and who hasn't lost keys and there isn't any way for them to refund them, only way forward is to fix the issue so it doesn't happen again. It's an item in a video game, you can get it again next week. As someone who lost a key as well it's disappointing but flaming the staff of the game your enjoying enough to panic over lost digital items doesn't seem right. Report the issue, hope they do their best to handle it, and move on with your life.