Here is the thing, it is perfectly fine to ban a player from your own playerserver. Even without reason.
They called you out for hacking, which they do not have proof of. (If they have, they haven't reported you)
But it is still fine for them to ban you from their playerserver, after all, it is theirs. They have control over it and they may ban you for no reason at all. It is their choice.
So for my part, I am not doing anything to this.
From Cubed? Yes, I'm pretty sure it is punishable to ban him from the whole network. Unless he knows we are joking.
From your own playerserver? No. You can of course try it yourself, I haven't done that. But it would be weird if there was a punishment for that.