Zero Security- Zero Care for Telus Customers

Did no one in the family ever get a court order in order to become her trustee so that the specified person is able  oversee your mother's affairs? Unless already authorized on her account, Telus wouldn't be able to take any direction from family members without the legal documents confirming who the trustee is. Even then, only the appointed trustee would be able to handle things. That includes cancelling or making changes to the account. Same thing goes for the banks and other services that she may still have.

How was your mother paying the bills of other users? Did they have her credit card number? As far as I can tell from my own account, I don't see any option for me to pay another person's Telus bill. Have you or someone in the family spoken with any of the resources out there regarding elder abuse? If her friend's are convincing your mother to buy them phones, etc., that would qualify. 

I'd be surprised if Telus allowed one person to purchase that many phones under a single account, especially if they have had payment issues.