It Is possible to recover the banned account. I think I do spamming so I got banned. I try to appeal via email and no reply.
"You have been permanently banned by a forum moderator, probably due to spam or plagiarism"
Spam and plagiarism is a mortal sin in this forum and once you get banned, theres nothing more you can do about it. As far as i know, If you have negative trust, you can appeal it to the person who gave it to you. If he can consider it then lucky for you. I know you know by yourself why you get banned though.
A simple advice: dont make the forum like a chatbox. Nonsense posts are annoying and subject for moderation.