It's incredibly unlikely they've cloned our actual service (which would require hundreds of proxy servers around the world). They've cloned the marketing part of our site.
If they copied anything you can see with "view source" and you haven't licensed it in that way, a lawyer could help you. If they copied the layout by writing their own code and creating their own assets, then I'm not sure.
Why does it matter then
I think they’re worried about the seo which is valid concern