Completing ESA50 + WCA Mental Health

I am in the process of being assessed for eligibility for ESA after having been on Incapacity Benefit for some time. I have to have returned the ESA50 Questionnaire by 10th December.

I have a question (as follows) that I would be grateful if someone could help me out with:-

Question: Recently my depression (I have long-term susceptibility to it) deteriorated owing I think to major problems with my immediate family and also my elderly mother who detemindly and inadvisably lives on her own. Although I have some somewhat elderly letters from previous doctors who have since left the GP Practice I am registered with, I have not been on medication for some time as the medication I used to be on ( Effexor and Sreoxat either didn’t work or made things worse. I have been enabled to get by by not having all the stresses associated with holding down a job. Of course the DWP and Atos will doubtless interpret the situation of my not being on medication as meaning I am now in robust mental health!. I went to see my GP about needing some form of medication again in early October (before ever I was sent any letters about having to apply for ESA and losing my Incapacity Benefit). My GP was loathe to prescribe anti-depressants because sometimes they don't work and sometimes they make a person worse (e.g. 'Prozac' - which turned some people into axe murderers' or 'Seroxat' and ‘Effexor’ which I was once on for several years with no change or some deterioration) but chiefly because my doctor perceived the circumstances which intensified my depression as being 'long-term', she thought reference to a new organisation called 'Let's Talk' [address removed] www.talk2gether.nhs.uk

After spending quite a long time trying to get an answer from 'Let's Talk' by phone, they told me they would arrange for a face-to-face consultation with one of their therapists. Interestingly they asked me a question during this phone call which bore a close resemblance to one in 'Exceptional Circumstances', they even sent me a 4 page questionnaire where 2 of the pages only were about my mental health issues and the remaining 2 were all about my employment status ! They then told me that 'after discussion with a colleague' they wouldn't see me, but rather, they would have a more in-depth telephone conversation with me when my name got to the top of the list – which could be as long as 2 months away i.e. too late!
Can you please give me some advice on how to cope with this area ' because it could be vital to get the support of some recognised Authority on mental health and 'Let's Talk sound amateurish, shy and faint-hearted ('Chocolate Fireguard' springs to mind).