T on Coach with 10 seconds left

[hbioteach]

Preface the situation, worst game in 10 years of officiating.
2 player technicals for aguing calls one for A and one for B.
Coach of B gets indirect technical for player technical called after sub was made.
Assistant coach of A double T and ejected for coming onto the court, auguing call, and cursing at partner.
2 intentional fouls called on players (one on A and one on B).

I was the R and tried to talk to the remaining coaches and players about trying to just play basketball the last 5 minutes and remind both coaches that must stay in their seats for the rest of the game.

Coach A after being warned 2x to be seated after receiving indirect T, is given T by me with 10 seconds left for standing and coaching while A has the ball down by 2.

Should I just have ignored the coach?