I stripped the screw head while installing a new deadbolt lock. The screw head is flush with the lock base. (Can't saw off the head of the screw) I drilled a hole in the screw and the drill bit broke off into the screw. (Drill bit still inside screw or so I think) I tried the backout drill bit and it got stuck in my drill. (backout did not work) What can I do now?