I am an artist specializing in still life and portraiture. I have a website and have business accounts on Instagram and Facebook. I had a call from a man claiming to be a retiring Ballet dancer wanting a portrait of himself on stage in his ballet gear. He told me a website to google so I could see a photo of him and it was a ballet dancer with the biggest 'packet' I have ever seen. During our discussion, he drew attention to the size of his privates and asked me if I should paint it in a way to draw less attention to it, but really kept the conversation on his groin. His call was number withheld and he told me he doesn't have an email account. The photo had the ballet dancer's name under it so I looked him up on Instagram and messaged him to ask if he had got in touch with me regarding a commission. He told me he hadn't but has had a lot of female artists asking the same thing and had considered getting in touch with the police. I now don't answer my phone when a withheld number calls but he leaves voicemails with him just breathing and I get the impression he is playing with himself. I want to pick up and tell him to fuck off but I have no idea who he is. He has my email and phone number so I don't want to piss him off and have been hoping he will just go away. But this has been going on for months. Does anyone have any idea what I can do? This guy is clearly harassing a number of women and getting away with it.