Atrocious lack of service

I have a courtesy rental vehicle in my insurance policy with Discovery in the event of an accident. On 18 September I went to Avis Menlyn to collect my rental car as my vehicle was in for repair. I completed the registration and paid R 2 250. When they took me to the car, I could not get into it, as it was too small. I asked if they had any other car, and was told that no other car was available, and that I must contact Discovery. I had been dropped off by a driver, so I was stranded without transport and nobody was interested in assisting me. They just said I must phone Discovery. This happened in the presence of several onlookers, and I felt totally humiliated, as if I had done something wrong. I asked for my money back, but they said that they could not refund me, but they would request a refund from their head office. It is now 25 September and they have not yet returned my money despite not providing me with any service at all except humiliation in public. This is totally unacceptable in any reasonable persons book. At no stage did they make any attempt to assist me despite taking my money, which a week later, they have not yet refunded. I will never advise anybody to do business with this institution given the terrible treatment that I received at their hands. I would rate them 0 stars if I could.