Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello, I logged on today after work and got notified that my account was banned?

I recently installed the client on a new laptop, but don't think that would be the issue.
Not sure otherwise why I am banned.

Can a GM please assist me with this issue.

Server: Nostalrius PVP
Name:LastGuardian

Thank you very much!