Wade is unable to continue with this so I'll take over.
You thinking it wasn't discrimination because you used a different letter is nonsensical. You also say that you said it to a mate, yet you decided to use side channel which broadcasts it to every civilian online. So far, I don't know what to say. I feel as if you want to be unbanned so you can further troll people on the community.
On top of this you expected a staff member to give an explanation as to why they banned you. Was it not clear enough? If you don't think a ban for plastering racial slurs across the game server is justified then how can I trust you won't do the same again?