I've found myself with a similar problem since getting Late Night for Christmas. I've never really done the chess circuit before, but my Legacy heir has a lifetime wish to be a grandmaster, so he's been spending all his free time (currently a teen) calling ranked players over. I don't know if the issue is paparazzi, but one woman just refused to show up no matter how often he called her. So I went into edit town mode and deleted her. The next opponent died during his game, which was just plain bad luck, but you can imagine my disgust at the time! Next opponent was no issue, but now I'm stuck with another person who will not show up. I even tried getting another family member to invite her over (they're good friends) with no joy.
I really wanted him to get his wish before aging up to adult, but over the course of a weekend, I've only succeeded in having one successful match. I think I might have to try this trip to China, because having to delete people one by one is tedious. I want to get the Chinese incense burner anyway.... Still, if anybody comes up with alternatives, please say!