power wont turn off and stay off

So I have been using the clip a lot since I am training for a marathon. and today for some reason it just stopped playing; I had just charged it so I new it wasn’t that; when i got home i tried turning it on and it came on fine.  Now my problem is it doesn’t stay off.  when i turn the power off it comes on automatically, without me doing anything; HELP. 

I would try a soft re-set (on switch in the uppermost position for 10-15 seconds) and, if needed, re-applying the firmware:  software corruption does occur.