Try this - https://www.canadavisa.com/canada-immigration-discussion-board/posts/10523591/I am in the same boat, haven't received the oath invitation letter but have been scheduled to attend ceremony on Nov 27th. Which IRCC number did you call on? I have been trying 1 888 242 2100 from IRCC's website but my call isn't connected to an agent citing the excessive call load.