Musa's unprofessionalism

I received a call today from a guy called Musa (he speaks isiZulu ), he was selling me Clientelle Life products. After I told him I am not interested, he insulted me. He said I must go and die. He went on an on saying I will die first and stuff. Deals on tap, is this how you treat your potential clients? I have never felt disrespected and humiliated in my life. I also wish not to receive further marketing communication from you, please remove my number from your list Musa ruined everything for you. I can be abused for something I don't know.