Rude Call Centre Agents

If I could rate them a zero, I would. Just got a call from a call centre agent. How rude can these people be!!! I advised him, very politely that I was not interested. He kept pushing and I continued to say that i was not interested, thanks. You would think that the first time you say that you are not interested, they let it go. He eventually says... I've never met someone so rude in my life... and hung up. I was the only politely saying that I was not interested and he kept pushing and I was the rude one! Unbelievable!!!!