Accident Claim and courtesy car

Firstly my accident claim was duplicated and made the insurance aware of the issue. They took time to assess my car to a point were the lady from the panel beaters called me to check what might be the problem as she can't get hold of discover. I contacted discovery to check what might be the problem and then is when the assessment was arranged after 10 days.

on the 28th of November, I called the person who is incharge of my claim ( Nombali Maseko) to inform her that they need to extend my courtesy car as my car is still not fixed and Avis wants the car on the 30th, instead i couldnt get hold her as usual then I spoke with Percy which said he already escalated the issue and Nombali manager will call me back after fours. I waited till the next day still no callback from discovery. I then called again and still received the same feedback that someone will call and still no one called me. . Today Avis wants their car and still I haven't recieved any feedback.

They delayed the claim process and now I have to suffer for their action. I used to get emails saying that my assessment was cancelled without any valid reason.