Terrible manners????????????

I received a call from a Cell C agent trying to sell me a contract , which I said I'm not interested. Only to be asked why am I not interested, I answered I can't afford it then the next question was how can I not afford it if I don't pay for the phone and I don't know the the monthly subscription fee and the last question was do I not work for a bank then she dropped the phone. I am disgusted with what just happened, calling me for new business and being rude it is unforgivable. I do not want anything to do with a company that has no respect for customers, I do have a prepaid data SIM card of Cell C which will be destroyed before the night is over!!!???? The number they called me from is *** please do not answer when they call ,you will regret it.