Using Views' Contextual filters in a Panel for one taxonomy term
If you want to display a different view for a country, I think what you probably want to do is use the Taxonomy Term override page rather than using contextual filters.

To do this, go to the pages admin screen (/admin/structure/pages).  Then, enable the Taxonomy term template panel to override the display of taxonomy terms using Panels.

To show a custom view, you can edit the Taxonomy term template panel.  This will allow you to use the taxonomy term as arguments for your view, because Panels understands that you are overriding the taxonomy term display.