You could argue they’re monopolies given there’s only one cable provider and one phone provider to an area. Maybe you could argue that’s a duopoly as both provide comparable services overall.
However, for many Canadian’s it’s actually a monopoly. Many areas do not have cable services at all. In a lot of areas, the companies have chosen not to compete so effectively residents only have one choice for high speed internet. Even in highly built up areas, like Toronto, many new high-rises are being built with only one connection, so again, residents don’t have a choice.