Without seeing it, i will have a guess and say that your lower arm may be bent, or the box section where the castor rod is bolted to has been damaged.
I am a little confused how the damage has made the wheel move forward though? That doesnt really make a great deal of sense to me. As for pulling left under brakes, my guess is there may be something like a sterering rack end bent or something similar causing a bumpsteer type of effect.