That must suck, after putting all that time and effort in, especially after overwintering them. I hear very similar stories from many of you guys based in the states.
Sorry to have to say this, but they do
very exceptionally well down here. Mine are on their third season this year, are never overwintered and remain outdoors in my raised beds all through winter. We are only just into spring, they got a heavy pruning a few weeks back where I even managed to harvest a handful of ripe pods. They usually put out their best and biggest pods in winter, but do most of their production mid to late Autumn. I grow mine in full sun and they thrive, I had to prune them again mid season because they were dwarfing my new season plants and hogging all the sunlight.