recovery email asked me for a new email address for the change and it will take few more days to reflect. Precisely 4 more days.
Your account was banned, not locked or lost by any hack or security issue so your case is not account recovery. It's actually a ban appeal in your case, and you must understand your situation this way.
As for the ban, the post was from around 2018. I cannot find the mentioned post on the history.
If a post is accused as plagiarism and moderator aggreed with that report, that post will be deleted and it explains why now you can not find that post. 2018 is too long in the past and there was no third party website that archive forum posts like Loyce.club or Ninjastic.space.
You can wait for moderator's answer in this thread about your banned account and which posts triggered that permanent ban.