False adverti*****t

I purchase a car from Yapyap carrentals and they told me the instalment will be R 2000.00 when I was suppose to sign a contact my instalment was R 3700.00. and the sales person by the name of Willien told me they will subsidise my instalment. the agreement was that I pay the whole instalment then they will refund me R 1700.00. I have started with the instalment and this time will be paying for the second time with out getting any refund. at the moment I have stuck with high credit instalment which I cant afford and they don't subsidies the instalment.

I have try to make contact with them and they keep on saying I have to wait 48 hours. this have been going on for 2 month.