fake government tryd to tell me im offered a grant 7000$ but I needed to load a green dot money card of 250 to receive it Washington number washington

I got a phone call from an unvailable number telling my I was approved for a grant then he gave me a confritation number and another number to call to receive it I calles the other number they said I been randimly chosen for a grant from the government but the only way to receive it was to put 250$ on a green dot card specifically from cvs and then buy a visa card to have the money transfered from one card to the next I told them I didnt have that money to do that she said take your time and get back ti me when you can I did some research and called her back within minutes and informed her I knew it was a scam hee voice got high pitched thank you and hung up