Horrible handling of a customer query

Bought a dress online, I realized I need a bigger size, I call my nearest store, Cresta , and lady says sure come through we have a bigger size, get to the store , dress still has tags and in the courier bag they sent it in. Manager says needs an invoice that was sent to me, I check my email I cant find the mail but its a YDE dress you can trace the sale on your system. he says to me their systems don't speak to each other, so basically he cant help me. He says he will call and get the invoice tomorrow, and I must drive again back to the store, as he has no way of sending the dress to me, (my address is 10m away from the store) this is a store that arranges deliveries for online purchases. This morning he calls and still maintains that I must drive to the store, I call customer services , a lady by the name Kathy says they would rather give me a refund than arrange to bring the dress to an address that is 10 minutes away, the would rather loose a sale of more than a R1000 than to pay R70 for courier delivery.