Here are the step by step on how to report the plagiarized stories found on Wattpad which belongs to you on Asianfanfics here. There's no use of asking your subscribers to ask the user to take down the story because mostly, it won't happen. What's more worse, was when the user is no longer active and the stories posted will still be there no matter what. 

You can report by yourself. You don't need people to gang up and asking them to take it down. It's pretty simple and all you need to do is click the answers. 

First, click here. It's a support/help content page for you to report. And no, you don't need to create an account on Wattpad.

For the first question, "What best describes the issue you are having?" 

Click "I found a Copyright violation".

Second question, "Are you reporting a story or an image?"

Click "Story". Of course stories since your stories were plagiarized there. 

Third question, "Are you the owner of the original material? Or are you the authorized representative of the copyright owner?"
Click "Yes". If you're the reader, you won't be allowed to report because there's simply no report button for anyone unlike here on Asanfanfics. That's why the owner have to report it themselves. 

Fourth question, "Which of these best describes what the user did?"
Click "I believe that this user stole my exact story. I can provide sufficient evidence such as links and original text files with timestamps prove this claim." 
Most of the stories there are exactly the same written in here and the only changes are the characters to their likings so it's easier for you too. 

After that, one last step is filling up the form. 
Enter your name, your email, link of your original stories and link of the plagiarized stories. Also do provide any futher details for the last form stated. I'll state an example below of how you can write. 

"Hello Wattpad, I've noticed from my subscribers that my story "(enter story title)" got plagiarized on this site. It's sad and upsetting for me as I spent hours writing the story for my readers but the hard work all gone to the plagiarized ones. I hope you'll take a look and I'm looking forward to your reply, thank you in advance." 

Make sure to be kind and be professional when giving details. You don't want to sound immature or else your email will be ignored and checked as spam. So yeah, after you're done, you shall wait for their reply! Be patient and it might take time but it won't take too long for you to received a reply for them. 

That's it and I'll hope this will be easier to the authors out there who're having trouble on how to report their plagiarized stories on Wattpad! =]