Sorry, SSJ12. I know I promised not to respond anymore, but this changes everything
All this discussion and guess what: I AM RIGHT! MS really doesn't care about it's customers and all the flaming towards me was based on false info.
Try shipping the 360 to a friend in the states and have him return it. Then sell it and get a console that's supported in Argentina and as a favour to MS. Complain at your local customer complaint service and have them deal with the MS issue. Complaining to official services will make MS rethink their strategy. Do not let this slide as more potential customers might make the exact same error as you because of lack of proper guidance.
Your chance to help some people, I hope you use it and I wish you all the best with whatever console/pc you choose to purchase next.
PSN name: Gazz1979 (feel free to add me, but please put your Vgchartz name in the message!)
Battlefield 2: Gazz1979
