Post pictures of the breakage. If the turn signal switch itself broke, it will be a more involved repair. If just the lever broke, you can get a new one cheap if you can extract the broken part from the turn signal switch hole.
Not 100% sure but as long as you don't have any pieces left inside the turn signal switch, you can probably just buy a new stalk and install it real quick. If there is a broken off piece left further in there, you probably need a new turn signal switch and maybe a new wiper switch as well.