Thank you for reaching out. I can certainly understand the frustration of not being able to add a specific e-mail account to your device.
If you're running into errors when trying to set up a Google account on your phone or tablet, please make sure you are performing the right steps and have all the correct settings. It's possible that you are doing the steps incorrectly, have accidentally denied access to your device, or have 2-Step Verification enabled for Google. Give this link a try for adding the Google account to your device for e-mail purposes: https://www.samsung.com/us/support/troubleshooting/TSG01001193/
