To ask "who made God" is wrong thinking, it projects physical science principles into a realm where they don't apply.
The physical realm is maintained by an invisible realm.
God is in that realm, logically you should rely on his answer, he existed before anything was created.
You could not even make one hair on your head, your parents didn't create you, they were used as ingredient providers.
We cannot make DNA, the machine designed to make our physical components.
Our creator is infinitely more intelligent and powerful than us.
People may scoff at believing in someone who they cannot see, but they rely on various things they have not seen - or understood - gravity, love, atomic forces, the money system, etc. We have the ability to be guided by eternal things and increasingly know God, after we have received that Spirit.