Not uncommon from my experience. Quite often your BI will know your Site Super and would rather maintain his network of contacts than do the right thing by his client.

Hi Bent_8
There would be plenty of structural engineers in SA willing to assist
Contact Engineers Australia SA see if you can find someone…

Bent_8
Get signed confirmation That it's fit for purpose
Cheers
Chris

Im not a professional, but that looks cosmetic at best.

Here in WA the complaint is lodged with the Building Commission
I believe in Vic it's the VBA though I may stand corrected.
LOL, The VBA Page has been removed?
There…

I noticed in your first email you mentioned about possibly withholding future payments.
You need to check the contract on whether you can do that. Some also add you have…

I guess this is one for a structural engineer, but do you have any drawings showing the location of the beams?
Were they meant to be that close to the edge?

The base plate column details are incorrect ie bolts too close to the slab edge resulting in the concrete edge cracking
there appears to be issues with the Concrete + Pour…