It means there is no way to speed up the processing of the application and IRCC cannot tell you when processing of the application will be completed.After contacting IRCC through webform and calling them couple of times, I received an Information letter stating "Unfortunately nothing can be done to your request to expedite the application and there is no guarantee of time when the application will be finalized."
Not sure what this means, I have my tickets booked for the whole family for 1st Dec