Warning Plug-in "WP Automatic" - Hackers infiltrate the website when buying products

i and my friends have purchased “WP Auto matic” product, but recently this plug-in is faulty and hackers have abused this and hacked all websites related to this plug-in. (I sent a warning to the author, and he doesn’t care).

You haven’t purchased anything.

It’s just your multi accounts.

Malicious code is quite often a “gift” you receive when downloading pirated/nulled scripts.

Lots of warnings on social media

OMG ! I don’t have time to report the impossible. I bought the product and got the key.

Help me
How to contact the admin to report the author hacking a series of customer websites??