I really don't understand these folks. You consciously plagiarise someone's post, You get banned and then you turn up saying "I have been banned but I don't think the reason is plagiarism, i didn't do it" even when the notification email these days clearly states as to why they could have been banned
Really surprises me... Should we conclude that after getting banned they just suffer from amnesia?
It's like getting arrested by Police when you are so high on cocaine, and then you assure them of how you didn't do anything. You even go ahead to take them to your home more stash of cocaine just trying to prove your innocence

Thanks for the answer, Veleor. I do not remember this post but it is obvious that is my post and it is plagiarism. Probably because I was busy or lazy I copied someone else post to fulfill the requirement. I understand rules are rules and it is my mistake. But it is sad that just due to a general post (which I did not steal anyone's original thought) among more than 500 posts I am banned. If admins forgive my this mistake I will not repeat this mistake once again. If not, that's ok. Thanks again.
Sorry, my friend, the ban on Plagiarism is usually permanent. You should have first carefully looked at the rules before getting caught up in such a thing.
Hey mate. I guess you did not read my answer completely. I did not ignore that I did plagiarism. But I really do not remember that post. No need amnesia or cocaine for that. It is clear that 1 post among 500 is very low rate to ban an account although rules say so. I mean instead of banning such people, admins could use some other punishments, restriction of participating bounties, 1-month suspension etc. Nevermind. I know my fault and you are all right.
I just ask a second chance if it is possible. If not that's ok. Good day all.