Yup... I had a similar experience. Received a call from a Chinese national doing phone publicity on a financial product. At the beginning of the conversation, I stated clearly that I'm not interested. She cut me and insisted that I must give her an opportunity to explain her product. After a few sentences, I indicated again that I'm not interested. She ignored me and continued talking. Then, I was so tempted to just cut the line but if I did that, I'll just degrade myself to be like these people who are disrespectful towards others. I held on the line. At the end of her ranting, I reiterated my stand that I'm not interested. In anger, she scolded me and said, 'I should have voiced it from the beginning of the conversation and not waste her time'. Before I could digest what hit me, she slammed the phone in my face.
That, my friend, is FT/FW for you.