ESA SUPPORT GROUP TO UNIVERSAL CREDIT

Hi all, new here and could really do with some help. At end of February this year I moved to a new town. I was in support group for ESA and also get PIP. Where I moved to has universal credit and was asked to put a claim in... My Esa has been stopped, I got £360 every two weeks plus my PIP and housing benefit.  Now I only get £666 universal credit and my pip, my money nearly cut in half. I've been sending in sick notes and filled out assessment for 6 weeks ago but I keep getting told they can't give me a time scale if or when I need assessed? The fact I was on ESA support group don't seem to mean anything! What can I do? I have mental health condition and this is making it worse.. Any advise much appreciated