Ouch... Misery indeed.
ceramic can be glued. Use some kind of 2 components glue. I'm not sure if it will hold and if you would even be able to put the case back together. But you will always see the crack/glue.
I would reach out to your TD and ask if they can get a case back. Another option would be a WTB thread asking for a broken watch you can use for spare parts.