It's a bit tricky since the only person I know who can look up the history of IP adresses that has been used on a forum account is mooman, and as we know he is not very active these days so there might be a while before he can take action on this matter.
Now If I have understood this correctly, someone stole your account and cheated on the server, you later joined the server at 04/05/17 without knowing this and got banned for evading right?