Rude tele-sales person

I was introduced to the female cancer policy through telemarketing. I had never really been interested in taking this policy, for various reasons, but the phone calls came regularly. I work in hospital environment and taking personal phone calls is a big problem. I did finally get the call after 19h00 at night and listened to the whole process, must say the training and script the sales people are following is excellent, if one is in a vulnerable mood it is almost a sure sale - this is not what I am complaining about. Nor the email response when I decided to cancel the policy after calculating the benefit to me personally, it was fast and professional. The problem was the cancellation phone call, I was told that the cancellation can only be cancelled by phone, so I answered the call, even though it is not ideal in my work environment. I tried to explain to the person that I am only interested in cancelling and not listening to the script, the caller became agressive and combative arguing whether my logic on my decision is sound or not and then calling me rude when I tried to cut her short in her tirade to just cancel the policy, she also ended up ending the call without greeting. I think this is exceptionally poor service delivery, especially considering that your function is to communicate with different customers telephonically. I believe the telephone operators should be trained to deal with customers who is certain about their decisions and not force people to listen to a script - this is what is making telemarketing a problem and why people avoid answering their phones, well I am definitely going to. You have the right to ask, but I have the right to say - NO.