I originally booked a Tango - S class fare. Yesterday I called their customer service and asked if they can put me on a different flight (there were several schedule changes to the itinerary). The rep was happy to put me on the flight I wanted.

When I checked my reservation today on aircanada.com, it shows my onward flights are on Latitude - B fare. And it says access to Maple Leaf lounges are $25 for Latitude. But when I click on "Maple Leaf Lounge" link on my reservation, it says "There are no new add-ons available for your booking. Your booking can't be enhanced any further."

Anyone know if I can purchase lounge access for $25? If yes, how?

Thanks.