That's it, when it comes to plagiarism, even if a few years have passed when the moderators notice it in the forum and once your account will be banned. And as others have said, even if you appeal, the chances of recovering your account are small.

You know that kind of offense is equivalent to a criminal case if we look at it. It's a pity that your account is at Hero rank. You can't do anything but accept the painful incident that happened to you here. Just go back to your new account here in the forum, at least you know what to do because you learned a lesson now so you will be more careful now.