Loosing the Loots

You can change your password using /changepassword [oldPassword] [newPassword]. this command only works in hub.

More information: https://commands.lksmp.fun/hub_commands/

The username nethupa_ronal is not banned from the server. If your friend is banned, please ask to submit a ban appeal:
https://community.lksmp.fun/forum-15.html

For the lost items, if you can share the last location (xyz) where your items were stored, we can check who may have taken them.

If you shared your password with someone else, that could be the reason. Please note that account sharing is not allowed, as it violates the server rules.

At the market of a house like place