I tried calling CIC. Enetred my UCI using options and at the end it asks for File number which we don't have. Used "https://services3.cic.gc.ca/ecas" to check application status with a Receipt number. I entered number from payment receipt and sponsor details. It show me your application does not exist.They can look up using your UCI or the receipt number (from fees paid). You can use the receipt number to check ECAS status. It will show up if the file is under review.