Service was slow and had additional charges

I had booked a B-class car, but when I arrived at the store, they only had A-class cars like Corolla and Sylphy available. They couldn't upgrade the car or refund the price difference. The car was relatively new. The service was impatient when asked a few more questions. However, the deposit was refunded quickly when returning the car.

I reviewed the car rental notice several times, which required us to return the car with a full tank to avoid unnecessary charges. However, when the rental company authorized a pre-authorization, they charged an upfront fuel fee. Regardless of whether you return the car with a full tank or not, they will levy the prepaid fuel charge. Now, I am asking Zuzuche (the rental platform) for this money back, but they have been delaying for a month without any response. Can't Zuzuche refund me first? If the rental company doesn't refund me, will Zuzuche also not refund me?

Insurance was added without asking. Very bad experience.

Expexted better service. Offered extra insurance!!

Good