Mistake 1: Never interrupt an update!
Then reboot your MBP with the option key and boot out of the drive Mac OS 10.13.2 update (select your regular Mac Drive), restart your computer normally, go back to App Store updates and start the all process again...
If App Store Updates does not give you the update 10.13.2, then go to App Store featured search High Sierra download, then select download, it will tell you that you're already on OS High Sierra and will send you back to App Store Updates, once there do a refresh of the updates available and Mac OS High Sierra 10.13.2 will be readily available to download for update again!
Good luck!