If you get a female caller, start talking porn styles. Compliment them on their beautiful English-speaking voice. Believe it or not, they LOVE this particular compliment.
Then ask them to say something like "I wrap my hand around your cock" in that same, smooth beautiful voice.
If they hesitate, be genuine at all times and say, "Sorry, it's just that I've been browsing some Indian porn sites and I'm a bit turned on right now. Could you please say the words?"
Start bargaining that you promise to let them finish the call if they'll just say the words.
Mostly you'll end up being transferred to an angry male supervisor and then you just wind him up by denying or telling him to go fuck his sister etc.
I have had one success though. It was a Malaysian woman, or some sort of Asian. She said the words and my dick became diamonds.
This is why I love getting those messages on my PC saying "stop everything and call this number". It's porno time!
Don't worry, nothing bad can happen to you. They know they are being completely fraudulent and illegal.