I've seen so many Newbies posting plagiarism, that this instantly triggers the same response. But since you've edited your Reddit post to confirm it's yours, I don't think you should be banned.
I read it, but I don't understand it at all
I'm not a native English speaker, but this sounds to me as if you're trying to make it as complicated as possible.Dear Support!
I accept the ban, and I don't want to appeal.
However I respectfully ask you to justify the decision!
I would guess they get many similar requests each day. In your case, you shouldn't accept the ban, but explain why it's wrong.
How is it possible to get the moderators attention?
I suggest to change the title: "Incorrect ban for plagiarism, I copied my own text".