Pathetic service

I had an accident on 8 April 2015 and my car has since been written off. I made several calls to my Claims Administrator Matlhatse Bianca Manaka, each of the time I call I'm told she is unavailable. I left severals messages requesting that she calls me back since she has better knowledge of my claim but to no avail. On 22 April 2015 I called three times leaving the same message and I was never called. I'm so desparate because I have a wedding on 25-26 April 2015 I would like to have a new car before then and Discovery Insure is ruining my plans.