Ban Appeal

I'd like to request some information on why my guild bank account is banned.
Server: Nostalrius PvP 1.12.1
Some characters' names:
Any information regarding its ban or proof I can provide to expedite this process would be greatly appreciated.
Server: Nostalrius PvP 1.12.1
Some characters' names:
- -Pleasurebank
-Pleasuremats
-Donatepta
Any information regarding its ban or proof I can provide to expedite this process would be greatly appreciated.