Referee's mistakes in World Cup

Soccer is the most popular sport in the world but one problem is constantly related to it: referees’ mistakes. Even the smallest referee mistake can change the result of a game and create a lot of polemic. That is why in a competition with the importance of the World Cup, every controversial call of the referee should be revised and corrected at the moment. For us Europeans, the World Cup is probably the biggest competition in the world because not only involves all the world but it only happens once every four years. In my country, Portugal, you do not need to watch the game to know when Portugal scores. Every time there is a Portuguese goal, almost everyone in the country screams and there is a huge celebration. In the end of each game won by Portugal, people drive around the streets honking for hours depending on the importance of the game. The opposite happens when Portugal loses: the streets are quiet and lonely. Losing is already hard, but when it happens because of a referee mistake, it is even harder to deal with. For us, people that take soccer serious, this is the worst thing that can happen. It is a feeling of frustration indescribable that is really hard to accept. If controversial plays were revised, referee mistakes would be corrected. Consequently no one would have to experience that extremely awful feeling of getting eliminated unfairly; defeat is much easier to deal with when it happens naturally. Allowing referees to review plays would make World Cup much fairer and enjoyable to watch.