Very urgent representation at employment tribunal needed

Hi guys,
This is probably a shot in the dark but I am now pretty desperate. Fact is I have been let down just today by some one who came to me from here.
I am a blind guy who has a 2 day Full Hearing for Disability Discrimination next Thursday and Friday (9/10 December) at London South Tribunal. I should say I am taking on a large Government Department.
The case is virtually fully prepared and witness statements have been exchanged. I have had help from Community Legal Advice who said the case was winnable.
I have no disposable income and am in receipt of benefits. I need someone who will not let me down at the last minute and who is capable of putting a strong case for my claim. It is not about winning I am a person of principal who wants their day at the Tribunal and at least discredit the opposition.
I need someone in the London area ideally as we need to meet up urgently to get things going as the is little time.
If you are genuine and prepared to help get in touch now. Thanks very much.