"Recovering your goods" in the sense of a website is to take it offline or restore the original contents. I think filling the page with stuff like this goes beyond recovery.
"Court gives permission" are the key words, though. I don't think they get to deface your walls with giant messages spelling out their side of the dispute, and on their own authority.
BTW, I don't know why everyone assumes the facts are as described on the defaced website. It's not like we've heard the other side of the story. (Personally, I'm unlikely to spend any time to study it in detail, anyway). But if I knew who the web designer was, I'd certainly stay the hell away from him. This was ridiculously unprofessional and inappropriate.