I would contact the dealership, ask to speak to the sales manager. Tell them your story, and be firm about two things:
1. You felt cheated/misled, and you would like a refund for the protection plan (that doesn't even apply to you)
2. You will elevate this to Kia Corporate if necessary for a resolution
The last thing a dealership wants is the head honchos having to fly all the way out there to settle little qualms like this, but they will if they have to.