The information contained here will describe the process. You can call a Canadian 1-866 number using Skype, if you are outside North America.
However, the seller of the item should have unlocked it, as Telus has no obligation to unlock devices re-sold outside Canada.
You will likely need the IMEI. Telus staff can provide you the exact info when you call. Folks here in the Neighbourhood are mostly just customers.
You need to speak to Telus - most people on this forum cannot help you. Sending the IMEI to people on this forum will not help. "Only" Telus can help you.
Sie müssen mit Telus - die meisten Leute in diesem Forum können Ihnen nicht helfen. Das Senden der IMEI an Personen in diesem Forum wird nicht helfen. "Nur" Telus kann Ihnen helfen.