Still waiting for ESA assessment

Hi my 13 week ESA ran out early November last year and had to send in another sick note to them, i have again sent in another one for 6 months because my other one ran out and i am still classed as unfit for work. , I phoned them early Feb this year after i was discharged from hospital and gave them a change of circumstances to my health, They said that it was in the hands of the medical side, as yet i am still waiting for an appointment, my dr's have sent the medical side all my medical records to read through from June last year to date. When i phoned them i found the person not very helpful and found him quite rude. A friend of mine filled his form in January this year and a couple of weeks ago had his assessment. I can not see how mine is taking longer. I am going to be losing my job this month due to ill health