Cheap Car Rentals in West Elsdon, Chicago

My flight was delayed, and I arrived at the dollar counter, just after they had closed. There was a lady still behind the counter, who informed me that because I had not arrived within two hours of the predetermined time they had rented my vehicle to someone else. How is this practice even legal being that I had already paid for it? I was forced to take rideshare to my destination and then back again the next day at an expense of more than $120. I am quite sure that I had pre-purchased insurance but dollar could not confirm this so I paid for insurance that I didn’t need , my total charge at the counter was an additional $124.22. The type of vehicle I had requested was not available so I had to settle for what they had. There were four shirts laying on the back seat, so I find it difficult to believe the vehicle had been cleaned , I think that the previous customer had just left it clean. Please let me know how to get a refund.