Worst service from Discovery insure

Last week friday 25th October, all arrangements for my vehicle to be booked in at the panel shop was made for 28/10/2019, I received a call from the agent of discovery to ask me about If avis had called me with regards to my rental for the monday and I told him I havent received any calls and asked him to get hold of them and let me know. Thereafter I received an email that stated 'Good day, arrangements made, if avis does not contact you, you may collect rental at any avis branch' So I went to avis tygervalley after I dropped my vehicle at the panel shop and I was told by the lady at Avis that they dont have any arrangement set for me and I should call my insurer, I called and then I was told that I should come back at 3pm and this was at 11am. I triedn to get hold of the same agent that sent me the email so that I could get assistance as I was strand now without a vehicle and no means to get around, When i call and asked the agent if there is any other way I could get help they told me I should come back at 3pm,I then told her that I have no way of leaving and then coming back,the agent told me I should get me a cab and come back later. at that point I didnt have money to waste to go back and forth, I have to wait till 3pm, this was a total waste of time and poor service from my insurer, and they have also made changes to my policy with out confirming it with me with regard to type to rental, this will be the last of me being a client of theirs.....