How do you handle unhappy customers who take it public?

I saw an exchange on twitter recently, where an unhappy giveaway winner (let’s call them A) stated that they would not enter the giver’s (let’s call them B) giveaways again, because their prize hadn’t arrived 3 months after winning it.

B responded to the tweet, and from that there resulted a long (public) twitter conversation . . . → Read More: How do you handle unhappy customers who take it public?