I contact United again 1-800-864-8331, but unable to go further. It seems United agent does not want ( or does not have a power) to contact EVA to confirm my award ticket , then modify it on their system.

United agents go by what it shows on United system and can not update manually . I hang up and call again, and I was told, the system (EVA) must talk to system (United) to confirm an award ticket and in order for for the seat to be valid, no human can interfere it .

They also told me that my confirmation status on EVA web is not valid . The United system still show that I have no award ticket on EVA flight BR18 and nothing United agent can do until EVA release an award seat to United by the system. And no one know when my waitlisted status with United is changed .

I have until 31 days before my departure day to cancel my booking to get a full refund . Not sure what best option to do at this point .