Firstly, please report this to us right away (even before driving with the car). Send us a clear photo of the fuel levels in the car (with the car engine on so accurate fuel levels are shown).
We'll then assess the fuel level and verify the information. Once we do this, we'll send you a reimbursement for the approximate level of fuel missing. You will be asked to stop by the gas station before ending your trip and still returning the car with a full tank.