Call at (00 1 613-944-4000) and then press following numbers when prompted (1,1,1,1,1,3,1) and at this stage a recorded voice will ask you three times to enter your UCI. Don't enter anything and then your call will be transferred to CIC Agent. After about 20 minutes you will hear voice of agent. Don't ask anything about status of your application just ask him/her in a polite manner to give you the UCI number. If you try to ask about your application they will not provide you any information. So just UCI. He/She will ask you couple of questions and will give you UCI. If you are lucky enough you will get UCI in first call otherwise after 3 or 4 calls. I got mine in 3rd attempt. And also call through Skype after purchasing a credit of 10 dollars this will save your money.
Best of Luck