Disappointed customer

Just over three weeks ago I went shopping at yde tygervalley for a brides**** dress and found the perfect one, however it was in a size too big. I watched the shop assistant place an order for the proper size at one of the other branches, all went smoothly and I was told that the order was placed and it would take two weeks for it to arrive. Over two weeks passed and I went to enquire about the dress only to get a phone call the next day to say that the dress is no longer available to me, the branch has no recollection of receiving such an order and that its no longer available in any of the other stores. I was left with no clarity on what happened to my dress order or any solution.