I'm having some trouble telling missionaries who come visit my house to go away. I'm from a country where being an atheist is being treated like you're evil so I sometimes refrain from telling people that I'm an atheist. I used to be a catholic and then a mormon before I started to see religions for what they really are. Since I got excommunicated from the mormon church, missionaries have been trying to get me back to the "right path" and convincing me to go to church again. These guys are very persistent and would not stop pay me some visits to discuss and share the "word of god". I try to be always polite and nice to them and tell them I'm not going back to the church and I do not have time for them. Yet, they still come and ask me to listen to them. I just want them to stop. What else should I do or say to make them to leave me alone?