On the way from my college to home, a lady asked my mobile and called to a toll free number 1800-120-170-170 and an OTP was sent to my mobile and that lady took a note of it on a paper. And later a call came from 8066696400, in which the OTP was repeated again. I doubted that lady and asked the reason why she took it, then she replied that it was for a purpose of sales of Hindustan Unilever. Is this a kind of cyber crime? What do I need to do to getrid of it?

Please let me know shortly.

Thank you.