And tells me he is not selling anything and wants to know where the homeowner is and when they will be back - I told him I am not answering questions of this nature to a stranger - he then gets the huff with me and tells me if that my attitude he is off, to which I politly explain I didn't ask him to knock on my door he says rude offs and leaves.
I know its a crappy job but why not just say "do you want to buy double glazing" I can say no, then they leave