Booked a flight last night ORD-AMS-CPH, returning BRU-ZRH-ORD two weeks later. Got a killer biz class fare of $1500, saw a sale being advertised and jumped on it. Wake up this morning to see in the app that the BRU-ZRH leg "cannot be confirmed." I've called United and they were unwilling to help, other than completely repricing everything at $4k. I am flexible - drop the segment, move me to coach, put me on an earlier one. They aren't biting on any of it. Am I screwed here? I tweeted them, any other channels you'd suggest?

I'm premier gold, if that matters, which I assume it does not.