Scam phone calls again

I have had 3 scam phone calls this week 1st was from windows saying my pc is at risk, I said this is a police station & we have software to prevent risks & we can trace scam calls, he hung up on me, next was from BT saying a virus is causing me internet problems & to go on my laptop & follow his instructions, my reply resulted in him calling me a crazy man, the last one was saying my tv insurance was due for a free upgrade due to its age (we just bought a new tv last week) I told the caller I don't have a tv, he then asked about my fridge & washing machine I replied I don't have any of those as I live in a hole in a cave, he also hung up on me, I cant wait for next weeks callers