Doesn’t work here. Every week I get calls for hdfc loan, Bajaj personal loan, act, axis loan and other shit. The calls are not from these firms. They come from agencies who get bulk list of numbers and they just don’t care about DND. Report the number and they call from different number when the last number is blocked.There is something known as a do-no-call-list. When called you tell them to put you on that list. If they don't action can be taken. I know this because that is what i did when i lived in the US and it worked. So there is a DnD like equivalent there.
Moment you mention that they cut you off. Now they can come at you with different numbers but there are rules in place to go after these people.
Keep in mind i'm referring to legit business calls. Scams like these people are doing needs something extra.
I mentioned it because that video makes it look like the west is entirely defenseless in this matter. Really ?