In order to get rid of cystic acne you should adhere to strict cleansing. That is my best advice. Wash, wash, and wash your face. If you have blackheads, it means dirt is trapped, if you have cystic acne it means bacteria are trapped. And an oily face traps more dirt in so wash the oil away every night before you sleep and don’t think using harsh soaps will help. If you are naturally oily, the drier your skin is the more oil it will produce to counter react the dryness.
Use the Glycerin and Oat facial wash from Body Shop. It cleans your cystic acne face squeaky clean with leaving it dry. You can also use a good toner from Body Shop because you want to keep your pores close and not open to prevent dirt from getting in. Do not use a scrub. You will over activate your glands and have more breakouts. I believe at this point your skin is very sensitive but you may use a weekly masque (peel off or wash off masque) for deep cleansing.