Car Rental in the City

My dad and I flew from Perth to Sydney and arrived at Sydney Terminal 2. Without checking any guides, we realized we needed to take a shuttle bus to Ace Car Rental's office outside the airport. I called customer service and was told to dial a 1800 number to arrange the shuttle bus. An Indian person with a strong accent answered and instructed us to exit through the main gate and turn left. Despite following these instructions, we couldn't find the location. We asked over five people inside the airport before finding out that the Ace shuttle bus stop had no clear signs. After a lot of hassle, we finally reached the Ace shuttle bus stop and had to wait for two hours with no bus arriving. My dad, who is 74 years old and has Parkinson's, was hungry and freezing at the airport for almost three hours (we landed at 5 PM and it was nearly 8 PM). My dad's condition worsened, so we decided not to go to Ace and instead rented a car from Avis at a higher price. When I called Zuzuche (the booking platform) to request a refund or to switch rental companies, they refused, claiming it was past the pickup time. We are still in dispute with Zuzuche and Ace about getting a refund for the rental fee. After reading reviews about Ace mentioning issues like the oil light warning, arbitrary deposit charges, and long waits at the Ace office, I believe that my decision was correct. Otherwise, who knows what could have happened to my dad.