I believe I was victim to a scam by Sixt rental car office in Reykjavik. I rented a car for two weeks on a road trip and upon return they claimed that this loose piece of plastic that was sort of underneath and behind the bumper was loose and therefore cost 570 dollars to fix. It was a part of the car I never in a million years would have thought to check before renting and even when they pointed it out I couldn't tell that it was even damaged. I also didn't have any incidents on the road that would have caused it. I refused to sign the paperwork admitting guilt and assumed they had dropped it. Then two months later they charged me. Just past the amount of time that my credit card insurance would have covered it (I think this was on purpose so they wouldn't have to deal with the insurance company). I'm at a total loss at what to do an I feel like they totally scammed me. Any help/advice would be so appreciated.