It sounds like it's defective. Although it's not simple to position it's not impossible. The easiest way is with two hands underneath. But the magnetic for feels different when powered on and you will always get some lighting up. My first one was defective, although in a different way.

Well, if you read about it, various people have problems with positioning. For me, it takes a maximum of 5 seconds and it floats, even without a cork mat. But it only floats when it is connected to the power supply. I can somehow clearly tell whether the base is connected to the power supply or not, also because of the possible flickering of the light. I hold the moon over the base with both hands, so I can actually feel quite well where it is being pulled and then correct it with my hands. But I think that's what everyone does, there's no other way.
However, the south pole (the flat part of the moon at the bottom) must be exactly the lowest point of the moon opposite the base so that the forces of the magnets can act evenly and keep the moon floating.
Perhaps someone else can try to position it.

The magnet also works without electricity, but with electricity the moon should light up, even if it is still on the palm of your hand. If you move it away and back, the light colour changes. Probably defective

no, not defective. Take to a