Poor contact, no resolution

In March 2023 a security guard closed a gate on my car, which happened to be a rental car. Avis took the repair money off my credit card and for over a year myself and an Avis representative have been trying to get a resolution from fidelity. The property provided camera footage of the incident. My insurance broker has had the legal department contact fidelity with literally no response in over a year! Between two large corporations, I just feel like the little guy with no rights. To lose money at no fault of my own and have to spend a year phoning and emailing for my own money is crazy!