Hi Jackie,
Call on 1-613-944-4000. (International number) Try with Skype or magic jack (free calls to Canada)
Use options 1 1 1 Line will be transferred to CIO.
Use options 1 1 3 1
1. Enter the UCI number if you have it.Else jump to point 2 below
2. You will be asked application number thrice. If you dont have the UCI number Do not enter anything.
Line will be transferred to a CIC call centre officer..
Ask for the UCI number giving the reasons why you want the same. They will ask you some details which you need to provide. If you are lucky you might just get the UCI number.