Unable to disable find my iPhone

I have disable find my iPhone from icloud on to the internet and from my phone as well, but it still showing on from apple website, tried turn on and off again tried so many things but its is still sowing that its on, and I am unable to reset the phone on to factory settings, when I try to reset the phone after apple bar it goes to the spining wheel and it spines for ever but does not reset the phone on to factory settings