Samsung Galaxy S5 bluetooth drains battery

[tablefor4]

Over the last couple of days something has happened and now the bluetooth on my Samsung Galaxy S5 surges on and off continuously. I cannot turn it on and have it stay on, or turn it off and have it stay off.

This is what I've tried so far:
Clearing the cache on Bluetooth Share, Midi and Test
Putting it in flight mode for 5 minutes and turning it back on
Wiping the cache partition
Starting it in safe mode (it still does it even in safe mode)
Factory reset out of desperation

Still no joy

The bluetooth is sucking the battery dry in about 4 or 5 hours.

Any suggestions?

Or am I faced with a faulty bluetooth adaptor? In which case, how do I disable it? (I do use bluetooth, but it won't be the end of the world if I can't)

 

[woodmonkey]

Have to say, it's so weird... I have never met it before. Why not send it for repair?

 

[tablefor4]

Cos I'm too cheap, haha

 

[tablefor4]

It's $250 to repair the bluetooth, so I could buy a second hand phone for less than that (plus my screen is cracked, and it's another $250 to fix that). So I'd be happy if I could just disable the bluetooth.