In order to take advantage of this deal, you need a VPN which offers connection via Argentina, if your main Epic Games account is not registered in Argentina already, you will also need a new account. Game is released tomorrow, great price thanks to Epic's regional pricing.
If you don't have a VPN, sign up for a 24 hour trial with CyberGhost.GUIDE
Open VPN and connect to Argentina region
Go to the Epic Games Store on the web
Create a new account and select Argentina as the country
Checkout with a fee free card like Monzo/Revolut
Disconnect from VPN, you won't need again