That's what you should have done in the first place to avoid such scenarios. You can't blame OP for putting out a scam accusation here. We have seen so many scams here having plagiarized white papers... Just look through the scam accusations posts and see for yourself.

You should try to talk to OP to take it down, and pray he gets back online and sees your message in time because the last time he was online was June 17, 2019