No LG# engraved from Antiquecut.com

Has anyone ordered from Antiquecut? They have both an Etsy shop and their own website.
I received my ring on Monday, and it came with an IGI report. However, the center diamond does not have the corresponding IGI number laser engraved on it. I have a 20×/30×/60× loupe and have never had any trouble locating the inscription on my other diamonds.
Just to be sure, I took the ring to a reputable jeweler who designs and makes all of their custom pieces in-house. They also spent time looking for the inscription and were unable to find it.
I’m really disappointed because the ring is beautiful, but without the laser inscription, I have no way to verify that diamond matches the report.