@XD_LOL: Can you try going to Settings > About Device > Download Updates Manually, to see if you can push through any available updates. Alternatively, please check the following link, navigate to 'How Do I Get Smart Switch On My PC or Mac' and download the relevant version:
https://www.samsung.com/uk/support/mobile-devices/how-do-i-backup-my-smartphone-to-my-pc-or-mac/Once installed, open Smart Switch, connect your device using the official USB cable and look for an update prompt on the Home Screen, next to your device details. Please be aware that if your Galaxy S7 was not intended for use in your current region, then this can affect your ability to update the device over the air.