This person has called me about windows xp twice before 7am. I told him I knew all about xp and was not interested in his nonsense but he keeps calling. I just told him to again to stop calling.
Received a call from 208-398-8379 at 7:50 am. In cases like this after I hang up I just block the number. I realize they probably have quite a few numbers but it is worth a try. I block all unwanted calls.