Have you tried messaging your vendor and cancel the order. What was their response? Many vendors prefer happy customers and refund the order.

I can only comment on the EU situation but because of customer protection laws we are allowed to cancel the group buy/ send it back after receiving it an get our money back (does not work with custom designed boards tho).

Yes, I was talking about this one. Many consider this a budget keyboard in the enthusiast keyboard scene - although I only partially agree with it. Since you were asking for a high end keyboard and didn't talk about budget at all I just suggested this one - high end for others could as well be e.g. a Keycult keyboard (they do not support a tri mode which you are asking for, just an example for high end keyboards).

Although the QK75 is only a "budget keyboard" it may be a really awesome upgrade. The group buy is unfortunately already over but many vendors definitely have ordered extras (e.g. Candykeys in Europe). You can get it with a trimode PCB.