Facebook wont allow me to verify my identity

Hi so ive had this problem since the 3rd of july facebook wont let me login ive changed password a cpuple of times and fb have sent me codes but even though ive done all of this a box comes up and says confirm identity so i click ok and then it says connection lost and doesnt allow me to do anything but i know the connection isnt lost .ive checked email address and all is ok friends and famiky have kept an eye on my wall and nothing untoward is going on on that .i just cant log in at all .im also locked out of messenger too !! Ove tried to access my accpunt on a pc too as opposed to my phone and still nothing it just sats an eeror has occured and this cannot be processed try again later !does anyone have any clue as to whats going on with my fb ? Any help or guidance would be greatly appreciated thanks all x