The BB area, with the headset area, are probably the areas in the bike that experience the most torque / force. On your photos, it's pretty evident there's delamination, someone F'ed up. You're not supposed to have half of your wall thickness (or more) not glued into the matrix of the frame itself.
Them dragging their feet is extremely disappointing.
Given their margin levels where they basically sell frames for 1500 that others sell for 500, i really dont think you should pay anything.
Makes me think of the forum user who bought a fake SL8 and while sprinting he ripped the frame apart at the BB area. Basically, this happens. And the headset areas sees enormous force when you brake and hit stuff. Numerous examples come to mind there (specialized headset recalls, videos of pros snapping forks on TT bikes...)
As frames get lighter, it's increasingly important that the inside looks pristine, because there's very little material. The SWORKS frames, LAB71 frames, are notorious for breaking like matches because yes they're light AF, because the walls are thin AF. So you can't have big ass loose carbon shards inside, that just means your frame has zero structural integrity there. Or even if it does, you're paying full price for it, why accept a shoddy product?