end of game situation?

[roadking]

1.7 left on the clock tied game, A1 is on the line to shoot two in the double bonus,B1,B2 and B3 are lined up in the free throw lanes with all offensive players back to play defense. A1 makes the first free throw, A1 attempts the second free but misses, ball bounces around the rim then falls to the floor, my partner chops the clock but instead of starting the clock the scorers table hits the horn in which all the players stop except the shooter which she grabs the ball and puts it back up and scores the horn sounds to end the game as she released the free throw, basket good. we sent all players back to thier benches for we could talk it over. we decided that the horn couldn't stop the clock and called the game, i think our only other option we could of done is to put 1.7 on the clock and give the ball back to team A because they gained control. what is the correct thing do by the letter of the rule in this situation? did we blow this one. this was at team A gym.