Sounds like someone is posing as you in order to either "share your stories" or to claim them as their own. It's a common practice. Usually it's users from Wattpad reposting works from here because most authors here don't use Wattpad, but it could be a user or users from there as well.

If you can't report the user(s) and sites individually, then contacting Nichiren here for advice is your best bet. If you've visited those sites already, make sure to scan your device for viruses.

These links look suspicious. I've never heard of these sites.

Those link look suspicious. Try contacting the mod here Nichiren and ask him what shld be done.
Plagiarising is bad! The perpetrator should be punished! 😡😡😡

Careful on opening the truyen4u, it contains virus… if you can’t find the report page maybe you can email the website itself…