Esa disability support group

Hi
I wonder if someone can clarify things for me. I was told on Thursday that I didn't need a face to face for disability on my esa . I have been put into the support group. But what I can not understand is why we do not get back paid the 14 weeks .... to me this is wrong. The conditions did not go away for 14 weeks, in fact I was left with hardly any funds to live and pay my bills which has left me in debt. Trying to feed a family on 74.00 a week and paying all your bills.
Can someone clear this up for me. I am also expecting universal credit to come back with the same.
To me we are being discriminated.... if your sick you get more money !!

Very annoying