Panoramic wifi keeps resetting itself.

For the past 2 days, the panoramic wifi keeps resetting itself.  It will be up and running for about 5-10 mins but then reboot itself.  Cycle thru red, blinking green, green, blinking white and then white.  After about 5-10 of internet service it starts all over again.   I tried calling multiple times with no help other than send a reboot signal.  I went into the store and swapped panoramic wifi boxes and same thing.  Called again and the rep asked me to unplug the wifi. Seriously?!  It a brand new box!!!  Well try unplugging the coaxial cable.  ITS A NEW BOX!!    does anyone have any idea why our service keeps dropping?   According to the reps our signal is "fine"    I work from home and this is not okay.   Any clues?  TIA