Bride & Co very unfair and disappointing!

Very upset with Bride & Co. had good service from the staff of the Parkview Branch. My fiancé chose a wedding dress and put down n deposit on this dress for lay-buy. The next day as all Brides to be does she changed her mind and immediately called Bride & Co to let them know she saw another dress online she liked more. They told het she can change the dress no problem. When she got there she tried on the new dress and fell inlove with it then chose it. Got to the counter the lady told her she must first pay the first dress in full which was about R3000 more expensive than the one she finally changed to , before she can have the new dress. So now we must pay for a dress that is more expensive in order to get the new dress which they don’t want to keep until we pay in full. This is not according to the consumer law. This is very upsetting.