U-Haul International

I rented a 17" truck from U-Haul on 8/16/2014, returned it on 8/16/14. I traveled 35 miles and charged for 96.6 miles. When we picked up the truck, it as at 115153.3. When we returned it, it was at 115188.3. They claim the mileage was 115249.9. In addition, when we picked up the truck it had 1/4 tank of gas. We returned it at 3/8. Yet, we were charged for 10 gallons of gas at $50.00, plus Fuel Fill-Up Service Fee of $30.00. The total amount for a one-day rental went from $129.11 to $315.21! This is outrageous and we have disputed the bill with our credit card company.