Since this person was a student at the time she treated you, she was probably not licensed yet. If so, and she was not a member of any professional associations such as the APA, then you probably can't file a complaint with them. Her supervisor is ultimately responsible for the treatment she delivers, so a written complaint to her supervisor/professor as well as to the head of the clinical psychology program (or whatever program she is in) at her university would be a good start. If she delivered treatment through some sort of clinic on campus, then a complaint to the clinic would also be good. Maybe they would think twice of having these students deliver therapy at their clinic if they knew what was going on and the lack of oversight by the students' supervisors. If her supervisor is officially qualified to give "supervision" through his professional association, then you could file a complaint to them that he was derelict in his supervisory duties. Just a few ideas....