We hired and pre-paid for a people mover (new Ford Transit) from Sydney Airport. We had the booking for 6 days given we were going to need the vehicle 3-4 hours over the 5th day. We were NOT provided with the Ford Transit, rather an old Toyota that had extensive panel damage. We were told if we wanted the Ford we have to wait over 30 minutes and it wouldn't fit in the pickup area! Further, the agent stated that if we retuned the car sooner (i.e. in 5 days) we could get a refund.
So, we changed our plans to get the vehicle back within the 5 day window…and thought it a good suggestion (by the agent) as we would save $383.
After several phone calls, and email of complaint, we were simply told that the T&Cs ion prepaid rentals are a use it or lose it basis.
So you know, I think the law in Australia is on our side based on a couple of important things:
A thing called Detrimental Reliance - the Europcar employee (yes I did provide the name to Europcar) explicitly told me that, if we returned that car by a certain time, we would only be charged for five days. I relied on this statement and modified my holidays plans in order to achieve that promised outcome.
Specifically, we changed the time we had planned to return to the airport in order to meet the deadline outlined by the agent. This change in behaviour constitutes detrimental reliance on the agent's promise, and as this person an agent of Europcar, equitably binds Europcar to fulfil his promise—in spite of any written contractual terms.
Oral Variation - The agent's promise is an oral variation of our written agreement, which therefore forms a part of our legally binding contract.
So, I recommend you chose other more customer centric car rental firms whose employees can be trusted. Avoid Europcar.
I'm sure you will find that most other car hire places are just as shonky.