A lot of acne is hormonal and there is nothing you can do about it

I know sometimes I get spotty skin and it's due to PCOS, no amount of diet-watching or skincare will stop it.
But definitely second Tumor's advice that if you have bad skin and healthcare, visit a dermatologist or GP because sometimes they can prescribe long-term antibiotics which help to clear up the bacterial infestation in parts of your skin and will help with vicious cycle of never-ending acne!
Also some other very good advice there too, Tumor. I'm enjoying these "girly" posts!