Poor customer service will never use Avis again

Avis Malelani, checked the website and a class c vehicle was available at the location, went to the branch and the brakes on the specific vehicle were not working according to the salesman. So they then proceeded to give me an E class vehicle, where originally the cost was R650 which then moved up to R1850. Querying why the vehicle showed as available had no joy with the onsite salesman, made contact with the call centre who advised to speak to he manager, wasn't able to get hold of the person, unwillingness to assist and couldn't answer why the vehicle is exactly the same, Toyota Corolla Quest class Manual C R650, Toyota Corolla Quest Automatic Class E, R1850. the expectation as a customer who has rented many times before would be that they provide the higher level motor vehicle for the same price.