It's galling that Air Canada continues to blatantly lie that their position is consistent with the Contract of Carriage and Tariff, and that refunds prior to the pandemic were goodwill gestures - their International Tariff, which applies to flights from the U.S., did call for refunds upon request for flights canceled by the airline up until its update on January 6, 2020, which changed the wording to only offer credits for flights canceled for reasons "outside the airline's control".
And of course, their current position presumes the cancellations were beyond their control, which they haven't proven - in my case, Delta continued operating the route that Air Canada suspended (DTW-YYZ) throughout the pandemic.