Experience of mental health support at university

I am in my 5th year at university after retaking my third year twice due to anxiety and depression. The retakes were due to not being able to attend exams or had in assignments as I would procrastinate due to my anxiety and perfectionism making me feel overwhelmed and panicky. This has now happened in my first and second attempts at third year, and is heading that way this year. Due to my mental health issues and some ridiculous sense of shame I find it really difficult to ask for help so I have not had any form of long-term help other than being put on antidepressants. This year I did apply for DSA and was told I would be given a mental health trained tutor for this semester but I am struggling to get this put in place. My university is small and the head of my module is very aware of my issues. Some friends I have been speaking to have told me they think the university has let me down and that for them and people they know, support was put in place for them without them having to seek it themselves. I was wondering if anyone else has had any experience of anything like this.