Amount to collections

I have recently received notifications from a collections agency that Telus has sent a bill to them. I have not had an account with Telus for over two years as I have moved back home and am now on my parents account. I never had any unpaid bills, and the monthly fees for wifi were taken automatically from my account. This amount to collections has began to drop my credit score when I know I never owed Telus anything. How do I get this amount removed?