Cars

We deposit a car an they sold that we wanted an they are falling to refund the money back an they don't want us to pick other car with the money we played they say they will deduct 20% an I said it OK deduct that 20% an playback the balance they say no I must pick a car an they will not dedicating the money okay I went to pick a car for 50 000 they told me I have to add 10000 please help