Sorry . . . I can hold a grudge with the best of them, and since there's many, many other restaurants I can go to, CB can go to hell.
And the next company that makes a mistake will know that admitting it and undoing it will have absolutely no benefit to them.
Once someone has chosen the other side, you will insure that they have absolutely no incentive nor any ability to rejoin your side.
Is that the message you want to send?
You win that skirmish, guess who wins the war.
The side you supplied with troops who are dead to you...