Person impersonating Xtreme PC on Gumtree

I was in the process of registering my business on hellopeter.com Imagine how astonished I was about complaints, that my business "advertise products on Gumtree" that is faulty, or we do not respond. I demand the management of Gumtree finds this person, and forward his/her details to us. We see this in a serious light. My business is getting slammed by an impersonator. For other ******** in future.....PLEASE...do a Google search to find out if your fly-by-night-business, does not already exist. We are going to file ******** charges against this person for damages.