Guest Wifi Network Removed - Really Cox no options to fix this?

I recently upgraded (or so I thought) to the Cox CGM4331 modem/router.  To say my experience with the setup was a disaster is a gross understatement.  Nothing worked at first; phone, printer, TV and other devices.  after numerous phone calls and two trips to the local Cox store, I have most things connected and working, thanks to Youtube mostly.  The one thing that I don't have is the ability to set up a guest network.  Is it still the case that Cox does not allow this capability? 

Thanks!!