Why isn't Plug & Charge working even though it shows as "enabled" in my Kia Charge contract?

Why isn't Plug & Charge working even though my vehicle and the station support it?

How can I stop my charging process at the station via Plug & Charge?

Can I charge my Plug & Charge capable vehicle at every charging station?

Is Plug & Charge for free? 

What should I consider when selling my vehicle regarding Plug & Charge?

How do I activate Plug & Charge?

How do I know if my vehicle is capable of Plug & Charge?

What is Plug & Charge, and is it free?