There is no quick permanent fix, but you can get results relatively quickly if you are will to make changes in your life.
Do some serious research before you take accutane, it is an extremely toxic drug with a long list of serious side effects. Google accutane side effects.
You need to buy a juicer and get started with cleansing right away. If your acne is that bad then you have some serious systemic problems, juice fasting can get rid of them. In your case I would recommend Dr. Schulze 30-day detox program. Nothing comes close to this companys products, if you use them as directed, you will be well. However to stay well you will have to make some long term changes in your life.