Woodford and Alamo not helping

I booked a car and picked up from Lanseria on the 15th and returned the car 1 day later. Upon returning the vehicle, the guy said I am still early for the return. I was billed for a day extra despite this. When I received my invoice on the 17th June, I called in to get this fixed and it was not. I have now made numerous calls to both fix this and to get my holding deposit returned and this has been met with pathetic customer service.