Have you got the car at home,.
The actuators go on quite easily, but if not fitted properly wont work.
If you can get your hand behind the light unit, and grab hold of the actuator turn it anticlockwise and as you turn pull it out,.
(If you can get it out without removing light )............
When you twist it, the first part, it SHOULD not come out, you should need to pull it, to release the ball end off the head light.
picture 1 ball end , picture 2 is the adjuster, picture 3 is showing that if you turn the adjuster, it should move in and out..
Can you check it does all that..
If it does all that then the adjuster is ok, and the initial setting is wrong..
If everything is working and it has been connected to the headlight properly, that is , the ball joint IS connected, then reply, and will see if I can find an initial setting off this one,,
You ARE welcome to have these two.. but no idea what post and packing is, as leave it to my lad ( that will be the cost p.p) but your connector needs to have a 3 wire plug fitment