The overall story works decently, and your end came together quite well. The main issues I noticed were logic and continuity flaws, along with bits of missing information. Some examples:

Why was her sister killed in recruitment? Aside from that removing a willing recruit, you say that is was done to show Alexea the cruelty of the world, but something like that is only done in particularly harsh cultures (which it sounds like this might be, and makes it seem strange that Alexea couldn't handle it) and typically only to harden the individual and get rid of naivety. There seems to be no reason to have any doubt that Alexea and her sister already had plenty experience with the cruelty of the world.

If socializing triggers flashbacks to the apparently extreme levels of bullying, how does Alexea function as an ambassador, when that job revolves around socializing?

How did she watch the receptionist from a secluded room? Perhaps it would have been better to know that it was the same one as when she'd entered, instead.

With the voodoo thing: does it keep her away from harm, or would it keep her alive even if dismembered or something similar? This is an important piece of information, especially in a tournament like this.

If she is working against the interests of the government she is an ambassador for, shouldn't she have been fired, if only for apparent ineptitude? On a related note, if she wants her government to believe she's still negotiating, why did she make such a scene leaving (where there would no doubt be cameras and she'd likely be dubbed a criminal), and why did she remove the proof that she'd ever arrived for negotiations to begin with?

How has her out-of-control temper not killed her from high blood pressure or an aneurysm or something? On the bus, she was told how many stops to expect, it was very few, and bus stops are usually pretty close together (so it shouldn't have taken more than 15 minutes max, and 5-10 is more likely), yet with each one, she becomes more enraged. That's a pretty minor thing to become so furious about, even if she in emotionally unstable.

So, in general, pay a bit more attention to how things are likely to play out, and what logically makes sense.

My review has been submitted for consideration in "Good Deeds Get CASH!" .