PCH(Mr. Cool Hill) trying to get me to go get a go get a green dot card to so he can put my money on it, he also kept asking me if I were alone or if my husband was close by and if he was to walk away, that this was a private conversation.

this man called me and told me he was from PCH and said that I had won 450,000 and I needed to go to a CVS to get a green dot card for me to be able to recieve my money. He asked several time that if I was alone. He said that this was a private conversation and no one needed to hear including my husbsand. He asked to go get in my car and blow the horn so he would know that i was alone. I told him that my horn didn't work.  he has called me back several times and i did not answer the phone. He keeps calling my work phone. He keeps calling from the same number. I have to answer because I never know who is calling, but since it's the same number I don't answer.