iPhone 5 camera and flashlight suddenly stopped working - still not working after iOS 8.4 update

A couple of days ago, the flashlight and camera on my iPhone 5 spontaneously stopped working. The phone has not suffered any damage or has been wet, the functions just simply didn't work anymore. One night I noticed the flashlight wouldn't work, and then the following day the camera wouldn't work.

I get the same symptoms as most of the issues I've read, with the black screen and the occasional ability to get the app to activate front camera. Front camera will work sometimes, and then if I can get the app to turn back around to the rear camera, I get a blurred image that then freezes. Other photography apps will access the front camera and will not turn to the back camera.

I can take a screen shot with no problems.

I have read the COUNTLESS other questions about this exact same thing. Here is a list of the things I have tried (in order):

- update to iOS 8.4 - no change, camera and flash still not working

- restore as new phone - no change (painful process as I hadn't backed up in three weeks, so I lost that)

- restore to previous backup - still no change

It is obvious to me that this is a software problem rather than a hardware problem, otherwise why would it be happening to so many of us exactly the same way?

Can an Apple tech please advise when a fix will be available for this?