Lack of feedback despite follow-ups

I reported a car accident on the 26th of February & provided a case number on the 28th; the same day I took delivery of a rented car which I have for only 28 days. I have not heard from Hollard Insurance following the assessment of the damage to my car, this despite two follow-ups by myself. As at today I am left with 20 days with the rental car, and lost at least four days in which work could have commenced repairing my car. I am appalled by Hollard's lackadaisical approach to approving claims.