disrespect for customers

Booked a car with avis on the 18/02/2016 for a pick up at lanseria. On arrival at lanseria to pick up the car I was told I am blacklisted with avis they can not give me the car. They then gave a form for a refund which I filled. <br> <br> Today on the 22/02/2016 I called avis to find when can I expect my refund, to my suprise I was told since I did not cancel my booking they were not gonna refund me. My question is if you can not give me the car how do you then turn around and say I should have cancelled the booking and if you gave me refund for to fill what does that mean, because to me you can only let somebody fill a refund a form when you realise that the agreement you two had can not be honoured which means it is automatically void.<br> <br> Upon trying to talk to the supervisor and the manager they refused to talk to me saying they will say the same thing the consultant is saying. I MEAN THAT'S AN ACT OF COMPANY REPRESENTATIVES WHO DO NOT HAVE ANY ETHICS, RESPECT FOR THE CUSTOMERS. I find this ridiculous . If this is what avis is about they do not deserve any future business from.