Salesmanship

I am dissatisfied with the service I got whilst purchasing a Nissan NV200 from Nissan in Rustenburg. Initially the Salesman I was dealing with told me there was a R30000.00 casback. He was hijacked by a fellow salesman who made same representation. I needed the money to pay off the other car. After investing much time and emotion and was about to close the deal, I was told no cash back was coming. By then I had made a decision so I asked if the payment could be deferred until 90 days. The salesman said he would organise 60 days. I accepted. Within 60 days I had debt collectors coming to repossess the car. I paid off, but was charged interest. I paid for number plates and registration to be done as part of the deal. Later the Salesperson said I had to do it personally. No refund was done. I had to pay extra cash at the traffic department and still buy my own plates. Now at 15000km I take my vehicle for service. I am told the is no service plan for a brand new vehicle? Something I specifically asked for and need, a reason why I only purchase new vehicles direct from a dealership (warranty and service/ maintenance plan = peace of mind). Again I had to pay. I feel I have been ******.