If your account went to collections, you will have to discuss it with whichever company called you. This isn't a Telus matter once it went to collections for the time you stated. Typically if a debt isn't paid in 7 years it will fall off your credit report. Any debt company can still try and collect the debt they just can't take you to court (2 years in BC).
Having said that at anytime you acknowledged the debt, or made a payment the clock resets, You can pull your own credit report with the two companies (TransUnion and Equifax) and see what is actually on it, not what a debt company is telling you.
Unfortunately you will have to resolve this on your own.