Three times I had to explain that we weren’t interested
No explanation is necessary. If you didn't invite them to your door then you don't owe them any explanation.
Just say "no, thank you" and close the door. Do not wait for any kind of discussion or agreement from the sales person. Just close the door. Works for me every time. I don't engage with them long enough to know whether they are rude or not.
Today I had Telus Sales person at my door around dinner time. Since I didnt answer door bell he started banging violently on my door. I am concerned if these people are legit Telus hired sales people. I am surprised Telus is revealing our personal info with these strangers. This person wanted to identify our name I said not revealing , so he said anyways I have all your information???