ND / Gmail had an email SNAFU a few days ago where some incoming emails from outside ND were lost. Perhaps this was one of them. Who knows. I'm glad they answered me quickly and made it right.
But I’m assuming they’ll still work.
Notre Dame Ticket Office said the previous tickets will not work for tonight. I bought mine from vivid seats and they've confirmed twice that the tickets will work. I have no idea what's going to happen.