Undermining a customer and forced to pay for their mistake

I have unfairly and predijucily treated at the Blu Bird branch. The store made an error with my order and refused to fix it. I have had the same.orser for the past year and have had no issue and now they make an error and now I lose my money. I strongly believe that if it had been a customer of different colour I would have been treated better. The manager was rude on the call and very predijuce.