Originally Posted by
LondonElite
Agreed, send the bills with a short explanation and I'm fairly certain you'll be reimbursed. It is odd though.
And if they don't, talk to your credit card company about a chargeback on the grounds that United did not deliver what you paid for, and was in breach of their contract of carriage.
Don't be surprised if United offers vouchers rather than cash, although probably in an amount greater than you're asking for. Up to you if you accept or keep pushing for cash.