Who called from 2026560408

I am getting a call that I will receive 9800 dollars in grants not to be paid back.  This im sure is a scam therefore I am not calling it back.

How do I get them to stop?

Called 1st time No one  there 2nd time  going to give me 9800  if I call this number  don't do it  SCAM

I've been called 7 times today alone by this number. They never leave a message, or they hang up when I answer except this last time when the lady said multiple times to call that number right back. Ugh! I want them to stop!

they  request  you  go to  walmart or  7/11 to  buy  an I TUNES  Card  for $250 and  they  you need to call back  and they  will  depoosit  the  money  in your  debit o  bank account  :(  , but the  scary  part  they  have  all my  info.
the  first  number is 800-555-655  then they  give you  a  id# and you  need  to call  202-656-0408