Failure to honour a sale as promised

My name is Noxolo Mthembu , Contacts: ********** 526, order no: ********** 7. On 23 May I visited Truworths Vaal Mall. I wanted a black dress for an occasion in July. A dress I saw had a tear on the neck and I was told I cant have it, it will be returned back to suppliers. I WAS GIVEN AN OPTION TO order a dress in Sandton store. A fee of 40 rands was charged so I could receive my order within a week. On 5th June I went to check if my order had arrived. A lady who assisted me went to the back store to check and she told me they had not received the dress yet. A month later I went again , and this time I was told there are no orders received in that month ( June). No records checked. I paid my last visit on 17/7 and was shown a book that my order arrived on 26th May ad I was called on 27th and the order was credited back to me on 12 June. This is not true. I asked for a manager whom I was told is out. A young black lady assisted me. She told me there is nothing that could be done. I ASKED for the dress that was torn because surprisingly it was still on the floor as opposed to the fact that I was told the store is not allowed to keep it. She said , she was not allowed to sell that dress. She offered to walk with me in the store to get something to wear that following weekend( 22 July). Nothing appealing. She refered me to a white lady who was very rude initially. She could not look me in the eye. She shouted when speaking to me. She said there is nothing she should do. I then told her I was unhappy because I had an event and all my other accessories were inplace. Starting to shop again would mean that I must look for accessories. She told me her area manager told her she could sell me the dress that was torn at 20 rands discount which I FEEL it was a ridiculous discount. She finally agreed to order and promised I will get my dress on 19/7. Yesterday I received a message from Head office telling me that the dress is sold out. I do not want to accept that because when an order was placed on Tuesday I was told a dress was available. I request that I am given a dress to wear on Sunday. I am not accepting to be treated like this. As a customer I would like to be treated with respect by Truworths management. They need to sell me a dress latest by Friday.