I don't think the vitamins will help particularly, though washing your face is important. There is no quick fix for acne. Your doctor may recommend some prescription medication. Keep your face very clean. Drink plenty of water. Eat a nutritious diet and get enough sleep. Try to reduce the stress in your life. Probably the most useful and effective things you can do are to apply hot compresses to pustules and cysts and never to pick or squeeze pimples. Playing with or popping pimples, no matter how careful and clean you are, nearly always makes bumps stay redder and bumpier longer. Here are a few informative links with additional home treatment ideas.

http://www.medicinenet.com/acne/article.htm
http://www.acne.com/cause_effects/causes_acne.php
http://www.acnerecovery.com/acne-information/causes-of-acne.html