Yes you can
You can log into your Fizz account to reschedule or cancel your technician visit up to 20 hours before your appointment. Service calls (for repairs), however, are the exception.
The Reschedule and Cancel buttons won't be visible in your account within 20 hours of the appointment time, because the tool cannot change the technician's schedule for the day. In this case, you have to contact us to modify your appointment.
To reschedule or cancel on the same day as your appointment, you must do so via a member of our Customer Service team : simply log into your Fizz account and click on the chat bubble in the bottom right corner of this page during our business hours.