I bought a car and the sales person told me that he will get me a car with the installment of 2500 however apon delivery of the vehicle I found out the installment it's going to be 4300 and I can't afford it

I bought a car and the sales person told me that he will get me a car with the installment of 2500 however apon delivery of the vehicle I found out the installment it's going to be 4300 and I can't afford it.i mediately ask them to return the vehicle I can't afford it they don't want to take the car back