A couple of pointers, if that helps:
* You should only try linking your application through GC Key only when you receive an AOR or UCI from them. There's no point in linking prior to that since its AoR/UCI that tells you that they have received your application. Right now you might be telling March 15th date as per your courier, however, CIC might not have punched your application into their system, and obviously, when they will do so you are bound to get an AOR.
** Once you receive AOR, try using all the combinations exactly as mentioned on your passport while searching your application in their GC Key Database. Use spaces, commas as is mentioned on passport, especially for Birth Place.
Hope this helps.
Yes it does help I'll wait the aor then.
Thank you