mophie wireless charging pad doesn't work

Hi:

Just bought this for $39.95 directly from Apple, #409903454.

It doesn't seem to work. We plugged the brick into a 120V AC source, and the cable into the black disc. The LED doesn't light on it. When we put our new AirPod Pro case on it nothing lights up either.

Can't figure how to contact apple directly for advice. Can't find any real instructions or troubleshooting literature; the paper that comes with the product just has a diagram to show how to plug it in.

Wasted too much time on a simple device like this. Frustrated that APple doesn't seem to have an easy way to contact them for help.

Any advice would be most greatly appreciated! Thank you.