Could you please explain why I've been charged a refuelling fee?

Certainly! Here's an explanation of why you might have been charged a refueling fee:

When you rent a vehicle from Simba Car Hire, the rental agreement typically requires you to return the car with the same fuel level as when you picked it up. If the fuel tank is not at the agreed level upon return, a refueling fee is charged to cover the cost of refilling the tank. 

To avoid this fee in the future, please ensure the vehicle is refueled to the required level before returning it.