Scaming people out of money

I have been getting phone calls from they say they are from the Gov. that I got a grant  for 5,000 dollars the first caller said and he had a deep middle eastern accent as did the 2ed caller that told me the same thing but this time it was 9,200.00 dollars this is the info they told me to do I was to go to the store and buy a I tunes card and then call him back and the Gov. would deposit on the I tunes card the moneys then I was to go to the bank and give them the card and the bank would give me the cash. Here is the information he gave me to call him back he gave me an ID#  A phone # 202 688 8795 His name is Curzon Valentine  his station # is 5387 Please do something .