Water pump bolt broke off

The top luckily bolt broke off and I tried to drill it out and got half way threw center of broken bolt and of course the drill bit broke...just want it out their is room I can put a bolt and nut on back of it if I can make a hole..any ideas on how to get it out or just drill threw it ...do I need to drill closest to the sides and work my way around it?? Any help would be appreciated..
Is it still in the car? If not scrap the timing cover, they’re a lot easier to find and I’ve got one if you need it, just pay the shipping. You’re wasting your time trying to go around it.

Jake