Ecuador keeps World Cup spot as FIFA rejects Chile complaint

That case — involving Bolivia defender Nelson Cabrera, who was born in Paraguay — was successful but ultimately benefited Peru, which rose above Chile in the standings to reach the playoffs and advance to Russia.

And that time Chile would have went to the playoffs if they just kept their mouths shut. Anyway I think that case was different in that Cabrera actually played a match for Paraguay, while Castillo has always represented Ecuador even in the youth setups. Pretty desperate stuff from Chile.