Ok so after sending some photos to the retailer I managed to get to talk to the guy in charge of the service department.
He told me that they are all like that to some degree and I should expect that from these Chinese machines. Told me to go spend $8k on a euro machine if I want things square.
I advised him they should have a disclaimer on the web site stating that these machines have extremely poor tolerances.
He said if I want to go any further I need to talk to the owner of the company. They are now closed for Xmas.
Could probably get a refund in the new year but I’m starting to think what’s the point?
The only way to get one of these machines with a reasonably straight platen would be to inspect several machines and that’s not going to happen. I don’t really want to spend big money on a euro machine and I’m over waiting for a good used machine.