disgusting cashier

Just angry at the way I was treated by the till operator at Newtown Square, bought a t-shirt yesterday and returned it today for exchange but there was a difference as I paid 130 and now the t-shirts am buying are 50 Rand's, she is telling me what should she do because she doesn't have money and with attitude, I mean is this the kind of service as I have to go back there again while I am busy at work