Concessions - just a thought

I know that a player can only offer his concession, his opponent doesn't have to accept it. Say if someone messes up a shot and starts pulling reds out of the pockets, but you don't accept his concession, do the reds stay where they are, or does the ref have to put the table back the way it was? Also if he takes his cue and rakes the balls across the table, what happens then? Or if you don't accept his concession, then you miss and he won't play his next shot, is that the match?

Concessions - just a thought