Please note a VPN is required only to redeem the code on the MS store, the Hola or Tunnel Bear extension in Google Chrome may be used for free.
1) Enable Hola or Tunnel Bear extension in Google Chrome, set region to Argentina and activate.
2) Go to redeem.microsoft.com/* and log in using your MS/Xbox account.
3) Redeem purchased code.
*Game will then be in your Xbox console library to download.