Avis - Shocking Service.

I have been regularly renting Group H cars from Avis for over 6 years now, and never been in any accidents, I am very disappointed in the service I have received from Avis. Friday the 6th of April I was involved in a accident when another car drove into me from behind at a traffic light. Completely innocent and in shock, I contacted Avis about the Incident at 19:06 and the operator (male) informed me that If I wanted a replacement car, I have to put down a R49 000 holding deposit. I then told the guy that this is impossible and was told that I cannot be helped. I was left next to the N2 by the corner of Victory Traffic Lights in a ***** area, and had to contact Uber to take me home. I was told I will be emailed forms to fill in and I still haven't received anything. I had to contact Avis again now, Saturday evening 7April @ 18:42 and Jason, the operator informed me that I was suppose to receive a replacement vehicle yesterday. I was told by Jason that I will be contacted by Avis and it is now 19h30pm and I still haven't received any calls or documents to fill in. I have paid for this Mercedec Benz Till Friday the 13th of April and I want to have a full refund of my money and a refund of extra expenses, like the Uber Taxis I had to pay for to get home and and again back to the Airport today to get a replacement vehicle from another Car Hire Company. On My only Saturday off this year, on holiday and with various family appointments, I had to cancel this in order to sort out the replacement vehicle and to get to the Police Station to get a Case Number. I would like to contacted regarding this matter. This type of service is unacceptable. Avis is very eager to take your money and hold huge deposits, but with disappointing service.