Hi JC,
Let's first make sure you are connected to the internet. To do so, go to Settings> Network> Network Status and confirm you are connected.
If that does not work you can always update your firmware manually. You can do this by downloading the update on a USB drive and manually updating your TV:
1. On Samsung's website (upper right corner), go to Support > Manuals & Software > Find your TV model.
2. Download the update and extract it to the root of a USB thumb drive. (Do not put it in any folders on the thumb drive.)
3. Connect the USB thumb drive to a USB port on your TV.
4. Navigate to Settings > Support > Software Update, select Update Now, and then select Yes.
5. Follow the on-screen instructions to install the updated software.
If you are still having issues please call us at 1-800-SAMSUNG, 8 AM - 12 AM EST, 7 days a week, or Chat with us on Samsung.com: https://www.samsung.com/us/support/contact/
^Brie