I got a call from this # saying I won money. I want to know if this is a scham.

This same number called me tonight and told me I won money.  Then after I told them not interested and hung up.  They called right back and said "No wonder your husband left you 3 years ago you ole bi***".  I want to know who this is and what is going on.  I divorced my husband 3 years ago after 3 years of marriage and scamming me out of every penny I had and I am 75 years old.

I received a call telling me I had won a lottery worth 2 million dollars.
They said their people were in the neighborhood and would bring the check to
me.  I had to give them a check for $900 for a portion of the insurance on
the lottery check and then they would drive me and the lottery check to my
bank so I could  varify it.  He described my house and said that they knew
exactly where it was.  I seemed a bit aprehensive and he told me to call
and verify the information by calling their claims department at 202-715-2877.  He gave me a validation code #779175 AB

I recieved a call from this number.  When I asked who they were and what it was in regard to, they mentioned it something about a check.   The name of the company and intent of the call was unintelligable.

Same call stating that I won 3.5 million dollars. Money to be delivered today. Baby crying in the background. Where's my money? How did they get my name and Phone #?