Bad approach and talking

Today I was at beauty world and I purchased 4 soaps . As I was heading out the person who was checking the recipient who I believe is the store manager he was a dark guy. He said I was given a discount of which I wasn't supposed to be given and him and the cashier were debating. The cashier did say no I wasn't given a discount. He said its my lucky day and I told him even if I was to pay extra I wouldn't cause i know my right as a customer. The attitude he gave me he said that would never happen at their store I should go to hell maybe that's where I'll get it at an discount I told him that I work in a retail store I know the policy he said than I should go to my store . The way he was talking to me and the tone and language he used I wasn't pleased because it wasn't even my fault. When I check the receipt and calculate the there wasn't any discount I did pay the correct amount