turn off find my phone

i have deleted my device from icloud and i still cant manage to shut off find my phone. its a device i still have its just that my phones home button has stopped working and i was told if i restore my iphone it might help. and i cant do so till i shut off find my phone. it also says when i try to shut if off verification cant be made and it also says that when im trying to connect to icloud in setting on my phone. thanks in advance for anyone thats able to help me.