Sounds like you have a legal case for damages there. Just make sure the ******* doesn't get away with it and do it to anyone else. I really detest these people who do these sorts of things.

Do you have other ex-colleagues in the same position? Might be worth getting together with them and spreading the load.

Make sure you get as much evidence in writing as you can. Otherwise it's one persons word against another.

I wish I could be of more help.