Don't worry, it's unlikely that your data is completely lost! Here's a few things to try first...
Check you're in the right game
Crazy Cards and Crazy Cards 17+ are two separate games, and your data does not get transferred. This can cause confusion if you're not paying full attention. Make sure to triple check you're in the right game!
Is Roblox down?
Sometimes, Roblox can have technical issues on their end. If you see a spike on this graph, the best thing you can do is come back to the game a few hours later.
Are you in the right account?
If none of the above two are causing an issue, double-check that you're playing on the same account as before. If you sometimes play on different accounts, it's possible that you're using a different one.
Still missing?
If you're still having an issue, no worries! Get in touch with our team below, and we'll get you sorted.