I'm disappointed

In 2014 I bought a car from a o motors they were calling me mad and doing a lot of effort, I was very happy and took the car a few days later I convinced my sister to buy a car there aswel and she did, a year later my mom started looking for a car and I also told her to go to ao motors because of there very fast service, according to a o motors they will give 2000 rand to a person who recommended them and if the sale is made they will pay out the 2000 rand.<br> Today I finally could get hold of the salesman we all worked through, we have been trying get hold of him and for 3 weeks now we are getting nowhere and each time he has an excuse.<br> I have been a nice guy and asked only for 2000 as they promised but they are not comming back to me I have to phone them now and I'm very unhappy because after they have sold a car they could not care less about the customer.<br> I feel they should pay out the 4000 rand if it wasn't for me they would not have sold those 3 cars, they made the money and now they are turning a blind eye.