Doesn't matter the delay the desk will aways try to get out of it being their fault to save on hotel costs, etc. I loath it but this is one of the few circumst

Doesn't matter the delay the desk will aways try to get out of it being their fault to save on hotel costs, etc. I loath it but this is one of the few circumstances where you should go full assertive. Don't take it out on the desk staff, they're having a far worse day than you, but stand there and make clear you are a problem that isn't going away until there's some resolution. Suddenly the hotel voucher will appear. I want the whole system reformed. I've had to do this with United several times now and hate it so much I'll quite literally spend $500 more just to avoid them.