If I'm understanding you correctly, you've been in treatment for a long while, but traditional treatments aren't working.
Well, I do have one thought I think is worthwhile. If you still suffer from depression, one effective method of treating it is ECT. Which, by the way, is not that bad. It gets a lot of stigma and most people don't even know how to picture it, but it remains the most effective and fast-acting form of treatment there is, and it's not frightening at all once you're actually there. Sadly, it still gets a lot of stigma, and is wrongly considered a "last resort" treatment. Have you considered that as an option?