Give the troubleshooting in this link a try: https://us.community.samsung.com/t5/Galaxy-S9/Omadm-firmware-not-complete/m-p/1370531#M41404
It would depend if your device is in warranty. Can I please have your full model number and IMEI in a private message: http://bit.ly/2JH2rq2
Updates are released to Carriers and thereafter, it is at the Carrier's discretion to release the update to customers. Since updates are released by Carriers in waves, we’re unable to determine when your device will receive an update.