Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello, my account has been banned just today.

I was just trying to sell an item in trade chat and checking the auction house when i got DC'd. When i tried to login on my account again, it said it was banned. I have no clue as to why my account has been banned. At no point have I ever botted, bought gold, multiboxed or done any such thing to break the rules. Therefore I am wondering why my account got banned permanently. Could anyone help me out and review my ban?

One of my charcters: Aurelía
Server: Nostalrius PVP (1.12.1)
Faction: Alliance

Thank you in advance.

Was just doing some research and noticed the following message from a GM concerning another person that got banned:

"Greetings,

Your account has been unbanned.

Try to not use any public chat channel below level 15 since this can result in false positives of our chat protection.

Best regards,
GM Team"

Since the character I was playing was below lvl 15 and I was about to use the trade chat, there is a good possibility this has been the reason for my ban. Hopefully this might help and/or speed up the process.