Jam a chisel, or somethin similar, like say maybe a flat blade screwdriver..? In behind the badge, get yourself a decent sledge hammer. Now this is important, its got to be big. If you struggle to pick it up with one hand, your doin well... Make sure your shoulders are quite warmed up, and be prepared for the blow. If all goes well, that badge should come off no worries. Hope this has been helpfull.