Major error on my bill - How do I speak to a live agent to correct it?

There was a major error on my daughter's cell phone bill (the plan was not applied, and each individual transaction was charged) and I need to speak to someone to correct this. All the stores in Ottawa are closed. I have tried calling every hour for 2 days and the system will not even allow you to wait, it simply hangs up on you. I have sent an email. How do I speak to a live agent to correct this problem? Help!!