Airport Hyundai

I had a problem with my car after getting it serviced at Airport Hyundai on April 16th, 2022 for Transmission Service. After the service, my car was shifting at [protected] RPM. I live in Scarborough, so I took my car to Boyer Hyundai, and they found that the transmission fluid was overfilled by Airport Hyundai, causing the issue. The fluid was leaking and burnt due to overfill. I contacted the Service Manager of London Airport Hyundai, and he told me to bring my car to London. He said that overfilled fluid does not damage the transmission, and they think customers are dumb. But if something happens to my transmission, I will hold Airport Hyundai accountable. The distance from Scarborough to London is around 200km one way, and it cost me $500 to travel to London. I asked the service manager to cover the bill I paid to fix the issue at Boyer Hyundai, but they refused. It's causing me financial and mental stress. If they don't resolve this issue, I will take legal action. It's not easy for me to bring my car to their facility, and if something goes wrong on the way, I'll be stuck. Why can't Airport Hyundai accept the report from the Hyundai Dealership? It will cost me more money and time to bring my car to their facility, and gas prices are too high nowadays. Are they willing to pay for the gas and my time?