Empy promises

I bought a new Nissan Magnite on May from BB Sinoville Nissan. I received a gòod service from them throughout the buying process and I was promised R2000 cash from the sales person by the name of Alpheous Khobo, such a hypocrite or that is the strategy he use to of giving empty promises to get sales. Mind you, his exact words was this is a token of appreciation for being a loyal customer but sad to say that is where good service ended. After 6 months doing follow up about my R2000, I am given the run arounds. I even escalated the matter to his senior by the name of George and got the shock of my life by his response" Morning. We have spoken to Alpeus and he said he will pay the money to you. This is an agreement between yourself and Alpheus and not between you and BB Sinoville. He has given myself and our DP the assurance that he will pay. Trust this is in order." Like seriously