applying certificates
Bumping this for any new experiences other than the post above. I am trying to apply an upgrade certificate to a r/t PTY - EZE. Using the online "request an upgrade" in my ConnectMiles account, it produces the error message "There are no seats available on the selected flights to perform the upgrade". However the text at the top of that form reads "use miles to upgrade" and doesn't mention upgrade certificates, even though it is under the My Upgrades menu on the left and above "my certificates". My fares are not L or T classes.
Does this form ever work? Or is the only solution to call ConnectMiles repeatedly?