Unhappy customer

I am highly disappointed that I called in at Suzuki to bring in my car for services that was supposed to take place on the 15th February 2024. They told me they do not have any slots for me on the 15th but they can book for me on the 19th. There was no customer education in terms of the car milage and the importance of the date. They only told me they do not have slots and my car is still under warranty. Suzuki now wants me to pay for car service while is still under warranty. I will never recommend anyone to purchase a car with Suzuki all they care about is a sale and seeing their customers always paying. I really need assistance on how I can handle this matter because I feel I was taken for granted as a first time vehicle owner and was not aware of certain things, Suzuki did not even bother to educate me. My number is ***.