If Darwin is wrong.
Then who created God.
See nobody can answer that question.
Actually BlueSky194, I can answer that question, simply by stating that the question is senseless in principle. And the reason for that is God is not part of, not a captive of, the 4D spacetime process that we humans normally experience. We have that insight on the testimony of at least three or so millennia-worth of cross-cultural (even universal, I'd warrant) human intellectual and spiritual effort for which we have actual historical documentation.
Cause-and-effect issues depend on spatial and temporal extension. But God is not "captive" to space and time at all. Therefore, to ask about the "causation" (the creation, as you put it) of God is a meaningless question. Furthermore, simply to ask such a question indicates an enormous "category error" has been committed.