I went to it. There is no COMPLAIN or REMOVE THIS CRAP button.
On the actual facebook page there is a little down arrow in the upper right. Click on that and it will give you an option to report it.
Here is the actual page...
https://www.facebook.com/groups/1553802068271852/permalink/1633550510297007/#
Follow the directions another poster has provided. (little down arrow in upper right of post...gives drop down menu)