There is no adjustment, no pull-down spring that I recall. And don't unscrew anything; that will only make things much, much, much worse.
If you did not bend the copper-ish spring (it's not coiled; it's the flat piece that connects the head arm to the chassis) to the point of putting a crease in it, you have a chance of fixing it. But if there's a visible crease, your chances of resurrecting it go to approximately zero. You'll notice that the head's bottom travel limit is set by a plastic flange hitting a metal piece (or the other way around; I'm doing this from years-old memory, so there are bound to be errors). Temporarily lower that limit by gently bending the metal away, and then rebend the head arm to this new lower limit. Once you've accomplished that, bend the metal back to its original position. With care and luck, you should be able to get the head to load onto the disk surface properly.
If you did not bend the copper-ish spring (it's not coiled; it's the flat piece that connects the head arm to the chassis) to the point of putting a crease in it, you have a chance of fixing it. But if there's a visible crease, your chances of resurrecting it go to approximately zero. You'll notice that the head's bottom travel limit is set by a plastic flange hitting a metal piece (or the other way around; I'm doing this from years-old memory, so there are bound to be errors). Temporarily lower that limit by gently bending the metal away, and then rebend the head arm to this new lower limit. Once you've accomplished that, bend the metal back to its original position. With care and luck, you should be able to get the head to load onto the disk surface properly.