The reason people are going via mexico is that you get the season pass with the game for £28.40 (Titanfall Deluxe Edition)
The season pass alone is £20
Summary -
Use Hola Firefox/Chrome extension.
1. Go to
www.origin.com and turn on Hola and choose Mexican (Will be in Spanish but use Google translate if needed)
2. Put Titanfall Deluxe in the basket (will be 599 Mexican Pesos)
3. Open shopping basket and click proceed from lower right corner
4. Disconnect from your proxy just before logging in to Origin.
5.Log into your origin account (and change page language to English if needed)
6. Buy it like normal
7. Order will complete as normal and you will get confirmation email and Titanfall now in your origin account!