My spotter payments

I gave Richard Rasebeka a car sales lead last year and I never received my R1500 payment as agreed. He later contacted me after I sent him a message asking for my payment since the client came to show me their car which they manage to get through my referral to Mr Richard Rasebeka. He said I can't get payment since the client got the car on discount. It was a difficult thing to process since I also had financial problems which he was aware of as I have been working with him for years with no payment problems from his side This year in may I gave him another lead, he would call me countless times when he could not get hold of the referral and I will use my own resources to get the client to talk to Richard. Eventually the client decided to continue with the sale and he received his car in June. It is now September and Mr Richard is ghosting me. I have to call text him in order to get a resolution from him. Even today he's still quite, can someone please assist me. The last resolution I got after I sent him countless texts was that they can't get hold of the client, funny enough he was able to get hold of the client using the same number but the finance department cant. I then resorted to give him the client's management number, but they never contacted the manager as I always enquire with him (the manager) since he is my good friend. Can I be assisted with my payments? Can someone take over Richard Rasebeka and assist me promptly. He last Said he will send me R1500 from last year's sale but even today I received nothing... this is unprofessional and unfair... worst service especially to someone who always gives positive leads all the time.