As I mentioned earlier in the thread, have a read of TVLR Forums - they have all the information that you need to know.
https://www.tvlicenceresistance.info/forum/index.php
Basically don't bother responding to them after you have initially told them you don't need a licence, it makes no difference, you still get spammed mail accusing you of being a thief, it just lets them know it's an "active" address.
If they turn up at your door, say nothing, sign nothing and just close the door in their face, like you would for any other door-to-door sales person - which is all they are, sales people.