Start by checking the wiring inside the speaker. Pull the driver out, and check it out.
Then contact Energy about replacement cost etc. Hopefully it's just a wire has popped off, and you don't need to spend anything to fix.
Many years ago my 55KG (121 lbs) Roti x Doberman decided he wanted to see what was behind one of my speakers... Speaker didn't stand a chance, and my heart sank. I know how you feel!
Don't worry though, provided the cabinet is OK, and it seems to be...