PIP stopped after change in circumstances

I called dwp about changes to circumstances in April when told to put in writing which I did . They had just awarded me standard rate daily living. They then sent me out another form which I filled in and posted back by end of April. I had f2f at home 4/9/18 received text on 13/9/18 to say report received . Heard nothing since so phoned today to bet told could be another 6/7 weeks as only dealing with reports from 2/8/18. This is a total joke . Anyone else having the same problem . I'm dreading applying for esa now as I've now had to finish work on ill health grounds  . And I really don't know where to start , trying cab tomorrow hope they can help as I called Esa dept yesterday to be told after 3/4 hour on hold that their systems were down but emailed a form out to me. Don't need all this when got cancer hospital appointments etc . Rant over sorry xx