Could more serious forms of acne be treated?

Yes, it can. Moderately severe or severe forms of acne, including cystic acne, can be effectively treated these days with a combination of oral antibiotics and powerful prescription topicals. In office, acne surgery to clean out clogged pores, intralesional injections to shrink nodules, and mild chemical peels can additionally be used to bring about control if necessary.
Absolutely. There are a wide variety of treatments available. You would probably be best served by seeing a dermatologist.