While your waiting for the new tuners, try to poke in a fatter string to lower the locking pin. Way easier than swapping tuners. I set up a Jackson USA with locking Hipshots and had the same thing happened, it happens with locking tuners. seriously just screw back in the locking thumb wheel, then unscrew a few turns, push in a thick string. The easiest is a wound string with a unwound core exposed as it will give you something to hold.