No customer service/Refund

Hyundai Woodmead. Three months ago I bought the creta from the woodmead dealership I paid R1000 for an already installed nedstar tracking device. When I contacted nedstar they informed me that they did not have a device in my car using my vin number as a search. Further they informed me that they did free devices as well as free installations. Why have I paid for a product that does not exist! Further to this I have not received my signed contract nor have I received the purchase documents. I was also promised a gift as well as a full tank of diesel. To date I have not received either. I have been emailing and calling Kulani, Riaan,Rudy and Solomon. All four are yet to get back to me. The customer service is pathetic!