Dismal and racial customer service

We recently bought a BMW in a few months back, it gave us an issue and we took it in at Leo Haeee Haval Hartfield as they have their inhouse workshop. There is a warranty covering the fault in the car, but the way I was treated was like dirt. I was there for more than 4 hours and no update on what's the progress with the car, when i asked one guy called Quinton he lost it with me and banged my car door and said he won't help anymore, reported this to his manager he also just brushed averything off and told me to just back off and respect their processes. After buying a car from them now it seems like a one night stand they don't give a **** about us the deal is over f%&k off. This was humiliating because I come from a customer service space. Two white managers made me feel like a stupid black customer, but when the other white customers are looking for answers an updates on their cars they are waiting for just like me , are given the outmost respect and attention. I will keep on spreading this unacceptable treatment to all platforms until I am heard. We are equal customers as the white ones our mineybisbthe same except for skin colour and that shouldn't be the deciding factor on treating us like sh&t. Their address is 1207 Burnett Street in Hartfield Leo Haese BMW and Havaal