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

Two idiot referees has robbed 2 points from Thailand.
I watched the whole match from the start, I still wonder why the idiot (first referee) given the red card after the yellow card?

When the Thailand captains verbal protest to the idiot (she have the right)! The idiot (first referee) not listen to her, He should give Thailand head coach a verbal warning through Thailand captain to her head coach, But he did not do that?

The way he do is telling to the whole world, I'm side to Japan. So what! And beside that I have doubt to the conversation between first referee (L.G. Macias from Mexico) and second referee (R. Espicalsky from Brazil)!

Do they understand each other?

I'm also a volleyball player, qualify state coach, and national referee too! I fully support Thailand team have the verbal protest, and follow by official protest to FIVB REFEREE BOARD.

This must be a fair match of the volleyball tournament (world class/standard).