Indian telecom upstart Reliance Jio suffered a major data breach, compromising the personal data of over 100 million customers, have prompted calls for India to adopt more robust laws to protect consumers.

Jio has repeatedly denied any breach took place and said that names, telephone numbers and email addresses of Jio users on a website called "Magicapk" appeared to be "unauthentic." The website was later shut down.

The company, part of conglomerate Reliance Industries Ltd, said on Monday that its subscriber data was safe and protected by the highest levels of security.