Just FYI, that's not your SteamID. Your SteamID is STEAM_1:0:63427916. You can find it in game by typing "status" in console, or you can find it by going to a website such as https://steamid.io/
to look up your steamid based on your profile link.
Who banned you: dont know
You should at least take a look at our member list
and see if any of those names ring a bell. Our members only have to check the forums once a week, so it could take up to a week before the person who banned you sees this thread, and by then they might not remember the situation. If you take the time to figure out who banned you, we can track you down and talk to them before that.