I had a response from my report yesterday:
"Current status: insufficient information
Unfortunately, the enquiry we have received did not contain sufficient information for us to clearly identify the exact location or understand the precise nature of the issue being reported. We need further clarification, so if the problem still exists, please call us on 0345 603 7631, quoting the reference number of the issue, so we can check the nature and exact location of the issue. Thank you.
Essex Highways "
ARGH. I clearly told them the exact stretch of road it was. I suspect this is just them burying head in the sand or making an easy excuse not to address the problem..