Free Xfi pod

I just received a message:   

You can improve your home WiFi coverage
with an xFi Pod.

It's included with your
Internet service at no extra cost.

We evaluated your network performance to help ensure the most WiFi coverage throughout your home. Your most recent review shows that your WiFi coverage may benefit from an xFi Pod, available to you at no extra cost.  Redeem here.

When I click on the redeem here, and log in, it tells me I am not elible but can buy them.  How can I get the free one?