complaint and do something

I need your help. I keep getting phone calls on my landline looking for a woman called J Kleimshmidt or Janssen. She worked for me a long time ago about 2015/16. She bought a lot of stuff from Talefberg and other places and I now keep getting phone calls looking for her. As soon as I speak, they hear my English agent and put the phone down so I do not know who is trying to get hold of me. I really need some help otherwise I will go to the police and lay a charge. I cannot even remember her correct name.. She is a ***** and is using my name as reference or counterfiting my name and signature