I Just recently got on and advertised my warp to my shop in my Island. Once a person warped to my island they were able to open my door open a couple of my chest and break open my mob grinder. And I was like WUT . And another person came and did the same thing so I /is ban them and they were still able to warp back? Was my island unclaimed? Can Someone help me get my claim back?

 

A lot of islands got unprivated, and I'm afraid us mods can't really do anything about it. If you'd like to have a private island, just make another one.

Closing, seeing that the question has been answered.