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After finishing college in the western Indian city of Ahmedabad, Saurav hunted for work for more than four months before he came across an advertisement for jobs at a call centre. He signed up, not knowing it would one day land him in jail.

In his job, Saurav - who asked to go by one name to protect his identity - called people in the United States, enticed them to sign up for loans and insurance policies, then told them they needed to improve their credit score by paying $50-$100.