Europcar Mexico Europcar Criminal offense and fraud Mexico City, Internet

We decided to rent a car from Europcar to drive from Mexico to Cancun.We booked a Hunday Vera with 4 luggage spots and we paid in full (including drop off fee) online with Credit card. When we arrived they gave us a small Chevrollet Chevy, this was in a lower category (Economy) with only 2 luggage spots.We spend 3 hrs trying to solve the problem but they just wouldn't
give us what we paid for. So we left at 12am, driving 3000km with 2 luggages on the back seat between us. With the first Chevrolet they gave us,after we packed everything we noticed that one of the stop lights wasn't working so we spend
another 30 min until they gave us another Chevy. This one had almost no petrol.The fun doesn't stop here. We were ripped off with the car size but when we reached Cancun to drop it off, they said we still have to pay $600 and another $100 for petrol (that we didn't received). I showed them my bank statements with proof from them that the car was paid.Then I called Europcar main center from my mobile (costs of 2 calls AU$165 on my phone-bill). Eventually when there was nothing else to do we took pictures with the car and we left 2hrs later risking for us to loose the flight. They threatened us and kept all our documents. Today I received my bank statement and noticed that Europcar charged me another AU$674, paiment that I never authorised. This is fraud!