I call from outside Canada & US... I called at +1-613-944-4000
You may try this number
I called this number +1-613-944-4000 many times as well but it gave you a bunch of options, and when I finally reached out to someone who could talk to me, they told me that the express entry application cannot be handled over the phone. Did you talk to any agent successfully visa this number? What options did you choose?