Charged T/O or not

[ljudge]

Here's the situation...

Team B needs the ball back and plans to call time out after the play. The play goes off and the ball is becomes dead. Coach of team B immediately calls a T/O. As you're stopping the clock you realize there's a team A player down due to an injury. So, you deal with the injury first and tell the coach he can't have a T/O until after the injured player is appropriately addressed. After you deal with the injured player the coach decides he doesn't want a time out. Do you allow it or make him take the T/O?