Please give a legit explanation why team Thailand lost two points and does not allow substitutions s

Because of the unfair game! I wanna know the reason of why we can't substitute the players? Why the referees give the free 2 points to the Japanese team? They said that they didnt see that the thai coach press the button to substitute the players if thats because of the failure of the technology why noone was willing to fix it? Why noone is responsible for it? Why the Thai coach needed to continue use that shit tablet? Why? As we all know that Japan is the leader of the technologies but why this ever happened in this competition? Please give us a clarification. Shame on you FIVB! Im not sure if you did it for money or sth but Im so dissappointed!! This should not occur in this big competition! The referees should be fired and banned from any competition judgement! And watch out! The world is keeping eyes on you!
With love :)