I've a number registered by my dad's name. Being an Indian myself, when these scammers try to call for IRS scams I just calmly give them 1 decent punch:
"Your family is cursed forever because you tried ripping a fellow brother. Every Karm you've collected till now will fall on your family. Shiva & Durga will will make them weep tears of blood!"
This works like a charm to the point they get disheartened and question their morality. Fear of gods wrath sells like hotcakes in India. My sibling taught me this.
Nowadays I blast them with AC/DC songs for half an hour and once in a while say Hello, Yep, Yes I'm listening to make sure they don't disconnect the call.
Best was when a girl was trying to navigate me to provide her remote access in Windows and I was using Linux.