Please stop sending me ads and people to my door

How can I stop the situation when your managers come to my home and annoying to ad your company? They do it every week, during the day and late evening, they doorbell rings and pushing me to accept your service! It’s unacceptable! Perhaps in the past I could think to change my internet provider to you but after such several visits I’ll never do it. Please stop do it and spam me with your physical ad by post! What should I do to stop it???