I’m sorry to hear this. What a night! What a morning! I’m sorry some of your flock was killed!! And I’m sorry that your not getting much traction with the game warden.
bears are so big and powerful, it’s surprising.
I know you are planning to build a bigger coop, more fortified, later. Perhaps in the meantime, you can build a sturdy fence around your chicken coop -large enough for whatever size new coop you build. The fence will be a sturdier structure to apply the electric fence wire to it. This way, the electric fence cannot be knocked down or bypassed so easily.