I don't know if this will help or not, but I didn't shadowban you. (I wouldn't post a moderation reply and at the same time ban the account without saying so; that would be incongruent.)

What happened is that, independently of my reply, HN's software started killing your posts because your account had crossed some thresholds at which the software starts doing that.

Like I said, it may be a distinction without a difference to you, but that's what happened.