Originally Posted by
Altaflyer
If the plane was the same then WS did something wrong and you should write in to them and seek a resolution and advise that you will write to the CTA if a suitable resolution is not forthcoming. You had a contract to be on that plane and they broke that contract (if there was a down gauge of aircraft things might be looked at differently).
There are multiple operational reasons why passengers may need to be re-accomodated besides change of aircraft type - all covered under the applicable tariffs (the "contract"). Yes, a complaint can be filed but the CTA will not do much if you can't point to a specific rule that was violated by Westjet or make a case that the rule that allowed the change is unreasonable or discriminatory (understanding that "discriminatory" has a very narrow definition in the context of the tariffs).
If the exact flight # was mentioned, people could provide more info on what may have taken place.