Does the page break any rules? Report it.
Does the page copy any of your stuff, send a cease & desist letter (Google for a template) to their hosting/biller/domain registrar.
If the page does not break any rules or copy any of your stuff, write a fake cease & desist letter
Failing all of this, I suggest you get yourself some app that looks for weaknesses in their hosting.
I see that you can barely express yourself in English, so sending correct cease & desist letters might be too difficult for you.