As was said above, email support. Posting a thread won't solve your problem, sad but true. If you don't know the person who did this, the devs might be able to figure it out because of the all mighty powers. All you can do is email support with a full explanation(don't leave out any detail).
Support email is.
Support(at)spacetimestudios(dot)com
Replace (at) with @ and (dot) with .
These kinds of players are known as griefers and our frowned upon.