CNC 6040z USB z-axis

[magicniner]

I am now guessing that the re-skin will not work with a legit copy!

That's generally the case, your support is then limited to that provided by the seller (generally that's none), if you paid by credit card or PayPal you have a (close enough to) legitimate case against the supplier for selling you hacked software with a (to put it kindly) non-genuine licence and no prospect of any functional support or the machine ever working long-term as described.

They won't provide a legit license because they can't, but they should at least refund AND pay return postage, they may refund and not bother with return shipping, then you could put the money towards an adequate re-fit with an external motion controller, individual axis drives, a solid PSU etc. Quite frankly the scamming barstewards deserve no less as they are Bilking hundreds of customers!