I can't speak to how the law works in Canada, but if this girl has pulled this stunt before she is probably counting on you throwing up your hands and just letting her keep the stuff.
Yes, taking her to court might be expensive and inconvenient for you, but it will also be a hassle for her. If you can afford the time and money I think you should let her know that you are going to pursue every legal remedy possible and use every legal resource at your disposal to get your property back. Give her one last chance to give it all back and then follow through - make it as expensive, troublesome and messy for her as possible.
If you do this right she'll be begging you to take it all back before long.
Yes, taking her to court might be expensive and inconvenient for you, but it will also be a hassle for her. If you can afford the time and money I think you should let her know that you are going to pursue every legal remedy possible and use every legal resource at your disposal to get your property back. Give her one last chance to give it all back and then follow through - make it as expensive, troublesome and messy for her as possible.
If you do this right she'll be begging you to take it all back before long.