Halo peter markams greenacres complaint

Hi i have experienced some disruptive customer service at markams greenacres, i came to do an exchange thought it would just be a grab and go quick quick but as i came to the till to do the exchange i told the cashier the item was a gift that i would like to exchange for a bigger size, she (the cashier) did the exchange and while the transaction went through then she decides to ask me how did i pay because she (the cashier) had put the credit back onto the account holders card. I got so ****ed because where was her mind the very first moment that i told her it was a gift and then her manager/ superviser came and even she couldn't do anything to solve the problem, i mean doesn't their customers mean anything to them seeing that i was honest and the cashier was in fault. I could've understood if i spoke incorrectly but clearly they are not taking responsibility for their mistakes and i must just accept that there is nothing they can do on their side to rectify their mistake, Including the manager of that branch cannot do anything its really pathetic, no effort at all. My advice train all your staff to do their Jobs correctly and to listen attentively and to give their best customer service to avoid publicity like this.