Here is a bit of the process I would you to verify things on the way to the game.
Verify Sound Object Assigned for Switch Type: Switch in Actor Mixer.
Verify (correct) Switch Container added as an Event Action to Event.
Verify Event has been included in the Soundbank.
Verify Events/ Structures for the Switch Container/ Event that the Switch
-Make sure all Structures are included.
-Make sure all Media is included.
Verify the Soundbank is getting updated with your changes.
Verify the Soundbank is being loaded by your Unity Project.
-Must exist in correct location within (Streaming Assets)
-Run Game in Unity Editor, Connect Wwise, Profile F6 (Soundbanks Tab).
Verify Event can be triggered while connected.
-Do other switches work?
-If you add a sound to the Event with no switch, does it work?
-What are the errors in the Profiler?
How is the AKSwitch being executed by Unity? (in code, OnStart, OnAwake, etc)
You're almost there, keep at it!
-lcl