Calls dont stop

I have been receiving phone calls from Hollard Insurance at all hours of the day, multiple times a day. What is even more frustrating is that no one speaks to me. They either put the phone down or I can hear a call centre in the background. When I call back there is no answer. <br> <br> Today they phoned again and I was surprised to find a voice on the other side and he confirmed he sells insurance for Hollard. When I told him about what I experienced he said this was the first time my number appeared on his computer. I asked where they got my number and they need to stop calling me. The phone went dead. I called back, no answer. <br> <br> By the looks of it I am not the only person with this problem, I googled the number they called me from, is was shocking to see how many people are being harassed by this company. It cannot be legal. <br> <br> Please stop.