I can't open my Amtech padlock (model 50mm 4 digit), I have used the slot at the bottom to set my own combination and it was working perfectly, but when I closed the padlock and set a random combination I've rotated the slot at the bottom just to try what will happen if someone try to rotate that slot when my padlock is locked off. Now it's not working. Is there any way to reset my padlock at this point?