I had that bell end ring me a couple of years ago (witheld number with a scouse accent) wanted me to give him my card details over the phone
. When I refused he threatened to come and get me because he knew where I lived. 
Me too.
He started with "I'm from the police, don't worry you haven't done anything wrong ... " after his spiel I told him I was surprised he wasn't pulling the fire brigade ambulance or dying kiddiewink scam. He got angry and said he'd "'come down at 6.30 this evening and "discuss it'" because he knew where I lived.
I said "it's a long way from Liverpool to Bristol pal but I look forward to it - do you want to meet my dobermann or my brother who's a real copper?" and hung up and reported the call to the police with the exact time it was received.