Courtesy Car

Good day<br> <br> I was involved in a car accident on the 15th May 2015 and my car was booked for repairs by my insurance company(Discovery)Arrangement for a courtesy car with Avis was made on the 18th May 2015 and paid a fee which is refundable upon bringing back the car on the set date 17th June 2015.Now the car dealership that was selected on my behalf failed to deliver my car in time. I called my insurance to advice on what to do since it was not my fault that their panel beater failed the time frame. This is the below message am receiving from my insurer and that I have to pay an extention with Avis since there is nothing they can do on their side.Question is why do I have to pay Avis extra if they can make arrangement for extention since the problem was or is with their panel beater.I told EugeniaC that I will not be accountable for the extra payment and she still sends me this below mail<br> <br> <br> <br> Please note I spoke to Jean who will contact you shortly regarding the courtesy vehicle,but please note that you will have to return the Avis rental vehicle as there is no extension.<br> <br> Regards <br> <br> Eugenia Chauke<br> Discovery Insure <br> <br> This is the above mentioned message from my insurer <br>