You are the pilot, you are the boss. Plane tries to kill you? => You try to kill the plane. Teach her who is the boss.
Now on a serious note
: "rigging" is a rather general term, it can mean many things, though usually involving cables. But, for as little as I know about this particular plane type, these slats have neither pulleys nor cables nor rigging; I seem to remember they are controlled only by springs, pushing against the induced drag. Surely you have already checked them for free movement? Added a tad of oil/grease at crucial points, according to maintenance manual? Compared activating forces port/starboard? Checked for birds nests/scorpions/illegal migrants hidden behind the slats?