Guys, I know all of you are very upset, but you also should keep your expectation real. Nintendo already responded that this was a permanent ban. Yes, there may be a 1% chance that they'll somehow change their mind and lift the ban in the future, but don't count on it. You should now know that you fcked up by playing online before release. Don't waste your time and effort wondering and hoping. Let it be a lesson and move on.
More importantly, please don't contact your local Nintendo and rage at them. This kind of ban came from their Global HQ in Japan. Therefore, unless you're contacting Nintendo Japan directly, there is no way your local Nintendo support can lift your ban or do anything about it.