Oh, that is such a terrible thing to happen to an artist. There is a legal process for removing stolen content, called DMCA. Adobe will only deal with your complaint if you use the official form of notice. You can start here: https://helpx.adobe.com/uk/stock/contributor/help/content-usage.html
thank you so much, this is my first post here and I don't know where to start reporting it. I will fill the form now, cheers.