Got called 7pm from a Private Number

I got a phone call at around 7pm on the 12 November 2015 she said that she phoned from On Air a Multichoice installer I have heard about the company before and immediately said I am not interested as I knew what it was all about after this she said to me that she hasn't even told me what it was about and how I knew that she was gonna sell me something. But I said after a while that she can carry on she rep**** that I don't have to be rude and slammed the phone in my ear as I was telling her it's fine she can continue I have a phone recorder that record phone calls automatically and this is clearly on the recording with the lady's name as well