The car I rented was not provided

The size of the vehicle did not correspond to the one I rented. When I pointed out to the staff the situation, they indicated to me that the reservation code corresponded to a vehicle of the Nissan March scheme, which although it was in good condition, it was much smaller than the size of a volswagen golf that was the I rented. The company explained to me that my reservation had the CCMR sip code that corresponds to a Nissan March and not a Volswagen Golf, so there was no way I could get a bigger car with the payment I made.