Before the official death of Tango as a carrier, I had booked a same day return YYZ-YOW on Sat Nov 29th
AC6120 and AC6133.
Those flights have now been converted to AC440 and AC465.
However none of those flights operate on Nov 29th.
When I do "View bookings", my itinerary still show AC6120 and AC465. None of them operating on 11/29.
Did I receive a call to advise me? Of course not.
Before calling AC, I would like to get your opinions.
Am I entitled to a full refund?
Can I pick the flights I want? (What I wanted was what I had, a 7am flight, leaving at 8am is now a little bit late)
Will they offer me a voucher for future travelling?

What are my options there really?