Here's the deal with the whole phonecall thing.
According to zeality's team, they called it up and it's "legit".
However someone else tried to call and they refused to transfer them into the legal department; instead they kept transferring them to PR. Apparently nobody had any clue as to what was going on regarding a cease order there.
Also, the e-mail included in the cease doesn't exist; it bounces back (or did as of yesterday).
Also, when Chrono Resurrection (or whatever the 3d scenario-based remake was called) was shut down, the letter THEY were sent was COMPLETELY different in appearance.