I recently found success with the use of Dandelion and Burdock supplements. These are very helpful detoxers and also are said to help with acne. I am not very familiar with any scientific claims, but this worked for me, and was pretty inexpensive. My acne seemed like it was brought on by wheat and oils and also a lot of other normal foods, so I suspected something was wrong with my gut internally. This has helped dramatically! I hope this helps.
(additionally I am a fan of apple cidar vinigar as a facial toner)