Another variant here concerning the 'you've got something wrong with your Windows' scam. Today I decided to ask them what department of M$oft they belonged to, as I work for M$ and knew there was no such. (Nearly true; my son works for 'em.)
Angry respondent: 'Yes there is, and where do you work, anyway' Me: 'Don't waste my time with lies.'
Most unusually, he rang back, again demanding where I work. Hung up. Phone rings again, but SWMBO answered this time.
"Where does your husband work?" "What?" "PUT YOUR F'ING C' OF A HUSBAND ON" Laughter from this end. It then sounded as tho' the caller was having a heart attack.
Phone put down.
No further calls.
Yet.