You can not buy an unban, but you can appeal here: http://appeals.ccgn.co/
Minecraft PC IP: play.cubecraft.net
CubeCraft Games
Cyan
KidBit
probably cus she actually isnt banned if you click on the link and look at the comments you see no one commented on it no mods or staff saying that she is banned which means no one of them seen it yet
tsuna404
I reported her and Moooofin banned her he even told me and she´s back somehow heres the proof: https://www.cubecraft.net/threads/anti-knockback-hacker-eggwars.134353/#post-562031 Below the title u can see the date i reported her.
KidBit
then she got an Appeal and it was accepted