Harrassing phone calls

I have been receiving several phone calls from this company. I have told them on a few occasions that I am not even the person they are looking for. The last time I had contact with them, they called three times in less than a one minute period.  When I finally did answer the third time I tried to explain to the gentleman that I have been hanging up due to the fact that I have already told them they have the wrong number.  He proceeded to talk over me instead of listening to me and tried arguing a mute point with me. This company has very rude employees and is incredibly ignorant in the way they conduct their business. The next time I receive a call from them, I will be making my own call to the police.