We've been in this position with my dp - he asked to be referred to CMHT for severe depression, waited for an assessment - to be told by the social worker that he wasn't ill enough for a service, there was a years waiting list for CBT and she just suggested he did some breathing excercises. (wtf??)
A few months later he had a total breakdown and was admitted to a psychiatric hospital. The same social worker was then assigned to visit him at home every few days for 6 months.
I told her that if he'd been given help when he'd asked, he wouldn't have become suicidal and desperately ill. She said that there was a criteria for giving a service - and when he's seen her he was coherant, gave eye contact, and was not planning to commit suicide - so, no service.
I'm only saying this because if it's the same with your team, you need to really express how you're feeling at your worst - it's an awful feeling when noone seems willing to help - i had some really terrible experiences with dp being so ill and no one taking me seriously. In the end dp stopped speaking, eating, moving - it was horrible.
The most helpful service i found was saneline - it's not always easy to get through, but they advise on services, they explained what i could do, and they also provide a telephone counselling service - the woman i spoke to then called back every few days to check on us when dp was out of hospital which was kind of reassuring for me. They might be able to help.
saneline
Also, mind provide an advocacy service which might be helpful - they can help with counselling too.
good luck, i hope you get some help soon