I am pretty sure that you dropped your package in French Guiana, which is an overseas territory of France located just north of Brazil - that or you just missed South America and your package hit Martinique or Guadaloupe, but most likely the former.
I just realized you said the South Side of South America - oops. I don't know why this would be then. Are you sure it wasn't further North?
actually, reading my comment i am an idiot. I meant to say south east.