I did ban someone who goes by the name of AbdulAbdi yesterday, but that might be unrelated.
Even though you hacked when someone else was hacking, it doesn't make it right to do so. There are other means of dealing with hackers.
And you should be able to provide us with a ban ID, whether by your username or by the username mentioned above. If you can't get a ban ID, we can't really unban you, unfortunately.
For now, I'm leaving this to my team to decide.