Dealing with poor T by partner in OT

[hbioteach]

Jv Boys. Game in overtime. Partner is 1st year. Very poor mechanics or should I say non mechanics. Whistle blows, no signals, no one has a clue what the call is.

I call a foul on A1. Doulble bonus two shots for b1. Coach of B calls a timeout that he doesn't have. Team T on B. B1 shoots 2. A2 is shooting first of 2 technical foul shoots. I'm the T. Just as a2 is shooting partner blows whistle. No signal. Goes to table and says a had 6 on the floor during the shot.

I go talk to him to ask him what call is. He says A has 6 on the floor (5 nonshooters talking to coach on sideline). I'm trying to think of a way out of this. He is insistant on the call. Why was he even looking at this? I tell him to go report the T on A6 and we continue the game from there.

I know by rule he's right but... A loses by 5 in double OT because of that call.

Here's the question:
What do you do when your partner makes horrific call like that?