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

It was a completely unfair match I have never seen. Can you explain what's wrong with the referees and Japanese technologies? In set 4, last point, referee did not allow substitution because of the Japanese technologies, everybody know that this is a bad action. In set 5, 12:7 team Thailand want to challenge foot false of team Japan, referee not only not allow, and also give points to team Japan, it is such a whole shit, I was strongly believed that Japan used a dirty and ungly way to kick up Thailand, it is out of Olympic spirit, please punish team Japan and disqualify team Japan for Olympics games.
The referee is not first time do that unfair judgement, they should be prohibited to be a referee anymore.
Once again, Japan is not a suitable place for organising big event such as World Cup.