Straight from our rules: Use of proxy-servers can result in a ban or may not be supported. Due to the amount of griefers that use proxy servers in an attempt to bypass punishment, connecting via a dedicated proxy server, VPNs, or routing your connection through a dedicated server host, can result in an immediate permanent ban.
It's not a "special rule": if you keep using this VPN, you will happen upon the IP address of someone who is banned, and you'll be banned again. We can't be here doing the song and dance of unbanning people constantly because they use VPNs, so if you get caught in another guy's ban again, that's on you and it won't be lifted.
You're unbanned, but keep what I said above in mind.