Hi Paz,
Generally coilovers are only supplied with front adjustable top mounts.
You can adjust the rear camber via the coarse camber mod or by using camber adjustment bolts (i think there are adjustable top mounts avaliable for the rear but not seen many).
Camber bolts have a habit of slipping if not tightened properly so i`ve gone to the coarse camber mod now. Just don`t take too much out of the hole, lol.
There are plenty of posts on here with jim describing order in which you should try it but here`s a little in a nutshell iirc.
Get the car nice and level. I use kitchen tiles with sugar inbetween the top two to allow the wheels to still move.
Ride height will alter toe and camber so set this first.
Then i adjust camber
Then toe.
I do my toe by setting two string paraellel to the centreline of the car.
Make sure your wheel doesn`t move aswell, or it`ll thow out the toe.
Hope this helps,
Saved me ££`s
cheers,
ollie