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If you are in Canada, British Virgin Islands or Samoa, you may obtain services from an SSA Field Office (FO).
The Offices for those in Ontario Canada are listed here
You stated you keep calling and cannot get through but you did not post who or really what office you are calling.
You may Apply Online For:
What else did you want to know?
You can try to apply online with the link I supplied or you should look at the link to the offices that serve those in Ontario.
The above lists the places that are available to assist you.
The offices are not specifically in Ontario but those serve the individuals that are in Ontario.
Check down the list for the one nearest to you and call them.