nahhh.. as my video sjhow.. internal layers is there..
I have seen screenshots of the board so I would say a 8 layer board. BUUUT! my guess is that he simply.. did not include the GND gerberfile when ordering.
I read the thread with you speaking to the phase 5 guy. I will say it's total crap and he should have requested that you send the boards back and he should have immediately issued you a full refund.
He also should have admitted that the GND was forgotten, ok, simple mistake, and this could have been solved quickly and quietly without any damage to his company. Now it is a PR nightmare. Obviously he is not educated in how to be a successful leader, entrepreneur or how to handle customer complaints, from which by all evidence you have given is a valid complaint.
Reading how this guy responds to you makes me NOT want to ever do business with him. I didn't trust this phase5 re-birth to begin with and now I even more don't trust it.
Until shipping, testable, verifiable products are available and tested by independent 3rd party reviewers I am not giving that guy ANY money.