So,
as I told you before, Apple refused to honor the AppleCare Warranty on my Air with the Hinge problem. After publishing that story I got some advice. Some thought I should go to an authorized dealer in Venezuela and ask them to do it. Another advice sounded weird, but interesting to me.
@cgranier recommended to just taking it to another Apple Store. I didn't have time so I asked my friend to do it.
(no, she didn't go to the Apple Store in a bikini)
Turned out she went all Social Engineer on them. Told them she was thinking of buying one and I was against it, so I loan her mine and see what happened! Hinge problem! She also mentioned how good of an Apple client I was... Who knows if it was her looks, the story, my buying history (he did check), or simply that she stumbled upon a great Apple employee, but my machine is fixed and I am happy. More with my friend than with Apple.