After reading this part of your ban appeal, I have the feelings that you don't know the reason why you were banned. Is it possible that you are banned for plagiarism and spamming the same time?
Did the admin or moderator tell you that you were banned because of plagiarism and spamming?
Could it be that you feel you have plagiarised unknowingly?

I have read where people say about auto ban and it looks as if only a moderator will know the type of ban.
But if you were banned because of spamming, I think you have a good chance of getting your account back because I have checked your history and it doesn't look like you were spamming recently.