Netgear GS316EP reports as GS108EV3 after factory reset

We have an unused Netgear GS316EP 16 port switch.   During troubleshooting we were asked to factory reset the switch.  After factory reset it reverted to it's default IP address.  When you connect via web to the switch via it's default IP address, the switch now says it is a GS108Ev3 8 port switch.  The configuration utility is completely different from before. I downloaded the newest firmware but have not yet tried to install.  The installation of firmware is even very different between the different models and I was concerned that the incorrect firmware (wrong model) might brick the switch.  How can we get our 16 port GS316EP back?  (We need all 16 ports not just 8)