How to complain about Hefei Chevrolet 4s shop

I ordered a Cruze in the Chevrolet 4S store in Cangzhou and paid a deposit of 2000 yuan. Later, I decided that their deposit would not be refunded, so I couldn't calculate the car price the next time I picked up the car. I have to pay again. I don't want to make accessories. Moreover, their car salesman is very kind to you when you buy his car, and his tone of voice is particularly bad when you don't buy his car. Now it seems that Chevrolet is a lie!