Bad customer service at Land Rover Menlyn

I took my car to Land Rover Menlyn for service and they found more issues that required certain parts to be ordered.As a black female customer I feel ill treated by the service I’m getting from Land Rover Menlyn. They have to wait for a part from London and now I don’t have a car and I have to pay for a rental I didn’t budget for. They treat black customers different from white customers, I was told they don’t have cars to lend me as a customer. This unfair.