You have to file a dispute to CRTC
http://www.crtc.gc.ca/eng/welcome.htm
Once your dispute is filed, Fido cannot collect your outstanding balance until your dispute is resolved, so when the collection agent calls you, you can give them the dispute number and tell them that you do not need to pay anything until the dispute is settled.
It's called Consumer's Bill of Rights by CRTC (
http://www.crtc.gc.ca/archive/ENG/Decisions/2006/dt2006-78.htm)
If you believe that some of the charges in your phone bill are incorrect, you have the right to dispute them. You must let the phone company know that you are disputing the phone bill and pay the part of your phone bill that is unrelated to the disputed charges. The phone company cannot charge you interest or cut off your local phone service because you do not pay the disputed charges, unless it has reasonable grounds to believe that you have disputed the charges as a way to avoid or delay making a payment.
Disputing phone charges
You have the right to dispute any telephone charges on your billing statement that you believe are incorrect. If you dispute a telephone charge, the phone company will investigate your claims, and will make the results of its investigation available to you. The phone company cannot consider the charges that you are reasonably disputing to be past due, but you are required to pay the undisputed portion of your bill.
As a general rule, the phone company cannot threaten to suspend or cut off your local phone service over any amounts that you are reasonably disputing (see "Your rights when the phone company wants to cut off your phone service" section).
Various scams and frauds exist that may affect your telephone service and could lead to additional charges on your phone bill. You are responsible for keeping yourself informed and protecting yourself against various scams and fraud. For more information about known scams and fraud, contact your phone company.
Complaints
You also have the right to complain to the phone company if you have any problems with the service you receive. If you have a dispute or complaint, the first step is to speak to your phone company. If the representative handling your call cannot resolve the problem to your satisfaction, you can ask to speak to the service manager or a supervisor in the customer service department.
If you are still not satisfied with the answer you are getting, you can contact the CRTC. The CRTC will ask the phone company to respond to your concern shortly thereafter. You should receive the phone company's response within 20 working days of the CRTC's request. If the CRTC is not satisfied with the phone company's response, it may investigate the matter further.
