Lappy's Left 4 Dead 2 Dedicated Server.

Private Server for Custom Campaign in Hard 20[docs.google.com]

How to join
You can't. We're not accepting stangers. This server is only for private/friends games. We do indeed play public on official campaign times to times.

I got banned while you were playing public
If you got banned this isn't Lappy's problem. The Admins use their powers only when it's necessary so you probably deserved the ban.