It doesn't surprise me that they don't handle more than mild issues. Many school-based services are often staffed by counselors rather than actual therapists; it's a difference in training level and level of services involved. For the most part, they do short-term counseling with stressed students.

That said, my first therapist actually was through my university (mind you, that was 30 years ago), and he did work with me long-term, but I think even then that was unusual. He was wonderful, but I suspect they don't really provide long-term services anymore.

You might call and talk to someone there to see if yours is a case they would serve more long-term, and if not, they probably can make recommendations to help you find someone nearby.