Plantinum Vehicles sale in Capetown/ bank repossessed vehicles. A Big ****MER

I have been **** by Plantinum Vehicles sale in Capetown/ bank repossessed vehicles. Address Cape Town Cnr Freedom, Montague Gardens, Spearhead Business Park. R120 000 deposit with their in house financing, I was purchasing a car hence they promised they deliver country wide it's a ****... How do I deal with them to get my money back...