Protecting a player?

[FrankHtown]

2 person game. I'm going from old lead to new trail. Girl on Team A runs into the padded standard under the basket and goes down. Team B is on a fast break. I observe Team A girl moving so I knew she wasn't unconcious. Team B takes shot, grabs rebound, and I blow whistle to tend to A player. I call coach to take care of her player, just as she stands up and starts walking to play. I tell coach I need a sub for her. He asks why. I said because I stopped play for you to tend to her. He said, "I didn't tell you to stop play." I said "Coach, I was concerned about your player. I need a sub for her. Or if you want to keep her in take a time out." He took a time out.

If a ref stops a game for a player, does he/she have to come out? I thought 3.3.5 pretty much leaves no option. justification.

Or if you beckon a coach, and he refuses to tend to her, or come on to the court, do I just let it go and continue play?