Leave me alone!!

Over the past week I've been receiving a call from an unknown number, which I didn't pick up as I don't answer numbers I don't recognise. After a week of harassment, I finally answered, to be greeted by a sales gentleman from Liberty. When he explained that he wanted to chat to me about what they could offer, I told him very nicely that I was at work, and I was very busy, and that I really wasn't interested in what he had to offer, so to please call someone else, who may benefit. Well, where other people would say \Thank you"and hang up"