As explained. You (despite of our warnings in-game and on forums) thought Genesis contacted you through a messaging program while it's broadcasted constantly that we'd never do that. You did not check his e-mail address when talking to him, you gave him your username and password, you granted him access to your computer by running the program he send to you and you nearly send him money as well. Please pay a little attention to the constant broadcasts and the messages you get when you log in, and the announcements on the forums. It could've saved you all this trouble Bombin :(
The ban was to secure Bombin's account and items. He wasn't banned by the impostor in any way. As Lenneth explained. The account was banned for damage control.