This number has been calling for a week, not saying anything and hanging up

Got a call from an Eastern Indian-sounding woman, making all kinds of promises about how much money I am going to get in grants from the government--to be used for educational expenses, medical bills, etc. Then, at the last minute, they want $3.87 as a set-up fee, and would I mind giving them my Visa number...?
Yeah--RIGHT ! ! !

wHAY A PAIN IN THE ?????  Need the Feds  to investigate further.  This should not be allowed!  This is a form of hARRASEMENT TO CALL SEVERAL TIMES AND HANG UP.

i am not interested in your offer...i spoke to someone yesterday and i told her i was not interested and i didnt have any money so can u please stop calling me thank u very much

they did the same thing to me with the same woman i told her i wasnt interested before she even started talking she just kept talking i said do i have to pay now she like yes i said well i dont have it she like its only $3 i said i know how much u said and i dont have it goodbye i dont even answer it anymore