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

Alright,. everyone know about the result volleyball yesterday ,all the world seen that it's unfair for thailand,. but someone said thailand unlucky i just prove is that right? there're 3 main points for math ...(to referee!!)

1.why we can't challenge in set 5 we have the right to challenge  but why?????  and japan got 1 point

2.Can't change player(cause by problem about connecting on tablet) as  thai coach inform to staff for 3 tims before  why not solve it.

3.    2 Free points(where points from?) and Red card  i think thai coach he keep cool and want to asked why he can't change player not complain or anything just wanna tell you why connecting tablet error please empathy us.

i would like to know which team your support,. you know in your mind .

From Thai coach

“In my life something like this has never happened. I have been a volleyball coach for 20 years and never saw this.”
“I asked why the touch panels were not displaying member changes and I asked for a clarification and I was given a red card.”
“Then I asked again why the tablets were not displaying the members and got the second red card. It was very unfair to the Thai team. We play with sportsmanship. This judgment was not right. The match is over now and we have to accept the result.”