A: Initially, you should review your order. Remember, only basic transition and progressive lenses are covered under the Enhanced Program. Also, be aware that billing at Walmart is not done on an a la cart basis, as it is done with other carriers. If you still believe there is an error in your billing, contact NVA at 800-672-7723. As always, please feel free to contact GEBA at 301-688-7912 or 800-672-7723 to assist you with any questions you may have.