I've had a bad run of luck being given info on the "Premium Services" line that turned out to be wrong. One agent will tell you "Double Miles Flown" means only redeemable base miles, while the next agent declares - with equal conviction - that the same promotion confers "double MQMs."

Book at your own risk and try to appeal later is the template.

DL assumes NO OBLIGATION to cover promises, assurances, rules and regs conveyed on the phone. There's likely no record of the call and your history of truth-telling is unverifiable.

It hardly helps to later say, "we're sorry for the misunderstanding." Entirely too much is riding on all this to disavow the declarations of a well-meaning, hard-working, but ultimately misinformed DL representative.

And I say this owing many of them a LOT in terms of past favors.