Hi!
I had the same problem, I finally managed to extract it by drilling with 1mm drill bit (cobalt Steel drill) forming a line, into which I could insert a screwdriver.
https://image.ibb.co/kFUJQ6/IMG_20171126_111313.jpg
https://image.ibb.co/io2556/IMG_20171126_111227.jpg
https://image.ibb.co/mUipXm/IMG_20171126_111258.jpg
