They normally give you the date when you first order TV. Did you phone in and speak with someone originally? How about since you ordered? If you haven't spoken with anyone since the first date you placed the order, call in as soon as you can.
Some more info: https://www.telus.com/en/ab/support/article/prepare-for-telus-internet-optik-tv-installation and https://forum.telus.com/t5/Home/Viewing-amp-Changing-a-Technician-Appointment/ta-p/78941
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