I have a stone castle, with an obsidian block near the top of it's central spire where I keep all my chests and loot. The only way into this safe room is by /f home, and the only way out of it is to drop 4-10 squares. We have 3 different drops to different areas of our castle. I know it wasn't betrayal and that my chunk didn't get claimed, because the only other one in my faction is my real life friend who didn't do it, and we still owned all our land. On the day we were stolen from, there was a single creeper hole in one side, revealing the obsidian block housing our chests, but it is too high vertically to be jumped up, even with potions. Even if someone did manage to get up the creeper hole, which was too vertical to jump, into our farm which is next to the obsidian block, they would not be able to jump vertically into the obsidian block safe room. I have added the most important screenshots to show the damage, although I took many more I wasn't allowed to upload them due to the limit, but have them upon request. Due the anatomy of my base, I am certain it is impossible to get into the safe room without a cheat, hack, glitch, exploit, teleport, or manually breaking it by owning the land (which they did not). I will be continuing to log onto this MC server, to attempt to find an admin and show them firsthand whats going on, and to get this problem solved faster, but if it isn't solved I will be taking my time, my friends, and my money elsewhere.