^^^ The best way to end this menace is to legalize sports gambling in India. I don't know why the government hasn't legalized it yet, when other countries such as the United Kingdom and Australia have done that. When you make something illegal, criminals get an added advantage to push it underground and rig the system, away from the eyes of the authorities. My advice - legalize and regulate.
Truthfully speaking, I think that the government is involved with all this shady stuff. Who doesn't know how corrupt 3rd world governments can be? The underworld mafia has been surviving for so long thanks to political connections.
The government could have legalized gambling a long time back, but they didn't since it would be disadvantageous for them. No 3rd world political party is corruption free in my opinion.