Budget Car Hire hidden costs

They say no hidden fees, yet the invoice they have deducted R434.78 admin fee because we had a flat tyre, even though we paid extra for full insurance cover. Admin fee?!? I am flabbergasted. They also charged a "one way fee" of R217.39 because when we had the flat we took the car to nearest budget car hire agency to get it fixed, but apparently we should have taken the car back to where we hired it (the airport). How unbelievably unfair is that? Oh, and they charge you to refuel their own vehicles. To date I have not yet seen the actual insurance contract that I paid extra for. Also, they don't even have the decency to send you your statement. they sms you a link that does not work. to find my statement I had to google it. Perhaps so that people don't actually see what they've been charged for?