I am not sure that the technicien can enter in your home without someone present.
You can contact the support to see
Go to this page https://fizz.ca/en/contact-us, if you are not connect login
The business hours: every day from 8 a.m. to 9 p.m. (EST).
Wait 5 seconds for the bubble icon to appear at the bottom right of the browser and click on the icon to chat with support. Try a different browser if you have issues getting the bubble to appear.
If the chat bubble does not appear, this means that the number of sessions waiting for our answers surpasses our processing capacity. If that happens, send us a private message via Facebook Messenger or Twitter.
Your can also send a message via facebook messanger https://facebook.com/fizzca and click send a message (this is a bit slower)
You can also fill a contact form from your account Once logged in, from the account panel go to My Profile → Contact Form (the subject are limited) and fill out the form and someone will email you back.
The technician in Montreal are used to this. If he cannot get in, he will call you to let you know he is outside.
Also if there is a lot of traffic in your building, someone leaving or coming will be able to let him in.
If you want to be sure, you can contact Fizz support to be sure they have your contact phone number and code.