Maybe Too Much Pruning
I had a camellia bush that had grown more in size than I wanted. I cut it down to about 20 inches from the trunk. Did I destroy it?
Certified GKH Gardening Expert
Generally, cutting off more than a third of the plant is not good. However, as long as the stems are still alive, it should regrow. For future reference, this article should help: https://www.gardeningknowhow.com/ornamental/flowers/camellia/pruning-camellias-how-to-prune-a-camellia-plant.htm