Hello, you can ask for your unban here:
https://appeals.cubecraft.net/ Just introduce your nickname and then your appeal code (4 numbers shown when you try to join the server).
Be as detailed as possible while saying what you were doing the day you got banned, if you have proofs of that day it will be helpful and you can drop them in your appeal.
In case your appeal gets denied, contact
@CrazymanJR through private conversation explaining why you think you got banned.
You can contact either him or any other Staff member.
In case nobody helps you after your appeal gets denied, you can send me a message and I will try to help you as much as I can letting Staff members know about your 'unfair' ban.