Hopefully, the car rental company has left a sign with instructions or a contact number. In this situation, use the number they provided then let them know you have arrived or follow the directions to the car park where a rental attendant will help you.
If there is no sign, check your booking confirmation email for a contact phone number.
If you still have no luck making contact, call us at 1300 722 920 or consider heading to the parking area and look for a uniformed staff. Don’t be alarmed. It’s not unusual to see unmanned rental desks, but rest assured there’s usually help in the car park where the rentals are located.