If unable to pick the lock, it is fairly easy to repair the lock provided that you have not broken off any of the metal tabs inside the bank door.

First put the lock mounting plate back onto the tabs. Then put the lock cylinder in place, wide side down.

Be mindful of the positions of the lock pieces in the second photo. Flip the mechanism over and place it on top of the door tabs.

Before you bend the tabs back into place, look at the Step 7 instructions.