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Do I understand correctly? You have already drilled a hole and broken the easy out inside the hole? If that is the case, you will need to drill around the perimeter of the easy out to try and free the broken piece. The broken easy out is hardened and can not be drilled out without using a carbide bit or better. After drilling around the edges, try a small pin punch to break it out.
Typically the easy out comes with the correctly sized drill bit. I am guessing here, but you maybe using too small of easy out to start with? What is the diameter of the stud you are trying to remove? and what size of easy out were you trying to pull it with? You need to use as large an easy out as possible. If it is rusted, loctite or galled in place. You can also use PB blaster, Liquid Wrench, heat and or tapping on the body with a hammer while trying to turn the stud out. Be sure to give the liquids time to penetrate and work their magic. Good luck
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