Post a new one as a disengagement. See what they do with that. I heard one of the simchah sites charges $150 to remove an announcement or picture. Real chutzpa and so wrong on many levels. I had a friend who got posted as engaged after the 4th date. They did end up married but dated 9 times before proposing. You have any idea what kind of pressure that can put on the boy & girl??
Anyways, much hatzlocha.