Just had the same call, I tried to pull them along to see what they were up to and then they got all pissy and started swearing at me. Called me a motherf.... The concerning part is they knew my last name and my address. Although I guess you could just get that out of the phone book.
I got a call from them as well, call is from india, the woman told me, that they think we british as stupid, im in canada, and they like taking all of our money and that we are stupid and give it to them, something about us going to thier country and dancing naked on tv.. call was about 10 minutes long, and she wouldnt stop saying how much they enjoyed taking our british money cause we were so stupid.
Caller ID is nothing, I have a sip trunk, you can enter your own number and call display info, to what ever you want in it.
I'm going to contact my SIP trunk provider to see if they can block calls from the sip provider that they called from, or trace it to find it and terminate thier service.
Called and said that they were from Microsoft and that I had an issue with my computer to which I replied that I didn't have a computer (I have gotten these called befoer too)....silence.....click.