Pureit / Hindustan Unilever — Few ladies are using the name of HUL and selling products nd using our cell phones to dial a toll free number

This morning few ladies had come to the door step, there is something going on, we are u aware off, these ladies sell Vim, domex, etc at 70/- actual cost is 100/-. Later they take our cell phones nd tell we need to inform the company about how many ppl have taken our products, so they dail a toll-free number, but later a code is received they are noting down the codes, I don't know if the Company is evn aware of this...If yes then we want to know the details behind it, if No then common people, uneducated people, ladies, give their cell phones, wat if something happens?