Sixt Rent A Car Fraudulent charges for supposed "damages" that were documented after I returned the vehicle. Phoenix Arizona

Beware of this company- fraud alert!  This is the worst rental experience I have ever encountered.  The representative talked me into upgrading to a nicer vehicle, which is fine.  What he did not inform me of, is that it was a hybrid.  He then talked me into prepaying for gas by misleading me that Sixt's gas price was "about $0.03 more per gallon" than the local price when it was actually more like $0.30 more per gallon.  He also did not inform me that, if irregardless of whether I would use a full tank, I would still pay for a full tank.  I assumed the company would pro-rate the fee based on how much gas was actually used.  So, because I did not know the car was a hybrid, I paid $45.00 for a tank of gas while using maybe 1/6 of a tank. 

To make matters much worse, when I returned the vehicle, during the final inspection the attendant circled ONE tiny chip (approx 3-4 mm in diameter) in the front windshield.  It was so small that I never even noticed the chip and it did not happen while the car was in my possession. The attendant stated that I may have to pay to repair it.  This set off red flags for me so I decided to make a final walk around with my own pictures to have proof that only one chip was circled and that I left the vehicle in pristine condition.  Sure enough, Sixt later sent me a claims ticket with pictures included that showed FOUR chips on the windows circled, which includes a side window and the rear window.  They want to charge me $103.00 to repair rock chips on the windows.  Chips on a side and rear window?  Sound fraudulent?  It sure does to me.