Unpolite sales people

Being an unpolite sales person when the rate of unemployment is as high as it is and while there are other people out there that would be more grateful to even have a job. It is highly unappreciated when one get a phone call to "Thank you" for your business and then want to sell you a product and the moment you tell them, no thank you I am not interested to just hang up the phone without saying goodbye or anything. Greet a person farewell if you can be so friendly when thanking me for my business.