Maybe you entered the wrong UCI, it's the number in the body of your AOR, right after the "Government of Canada" Banner. If you entered that one, maybe try the application in the title of the email starting with Rxxxxxxxx - and select application number in eCAS. And if still nothing pops up, try GCKey to see if you can link your application.
If you got the acknowledgement of reception, you should be able to track your application.
Please check whether you confused the UCI and Application numbers?
Good luck.