Poor poor service from "sell us cars"

I went to" sell us cars" to try and sell my vehicle .they asked where i had purchased it from and becauae it was purchased from a dealership in umgeni road ,they did nit even look at my vehicle.so they assume all dealers on umgeni road are ************....what an insult to genuine dealers on umgeni...if they had only given me a hearing ,they would've found out that my vehicle was actually from Umhlanga bmw and the dealer just facilitated my finance on the vehicle .their loss....but the treatment was very condescending and made me feel like im doing something wrong ...shame on you especially when you represent such huge muslim owned business ,namely DURBAN SOUTH MOTORS .