Towel waving and dancing are taboo. Seldom confront a referee. Verbalize to your captain within the ref's earshot, your displeasure. By going through a third party this diffuses the situation. By using your captain, you get two voices.
Referees like to talk to captains.
Never call a timeout in the first half. If you have to you are probably going to lose anyway. Every player must be able to handle the ball. No matter how vicious the opponents pressure, they will have at least one guy on the court who is weak defensively. And the guy he is guarding is the player who will break the pressure.