Any ideas please?

I’m not green-fingered in any way shape or form so have no idea what these flowers are. I bought them at the local garden centre after lockdown and they have really shot up. They must be at least four feet tall and are towering above the Lavender.
Has anyone any idea what they are called please?
Spent most of the morning on the phone to Vodafone Call Centre trying to get an old phone unlocked! Once I’d calmed down, I cut my grass and did a bit of weeding.