Pathetic Service Received!!!

Good day,

On the 23rd of September I purchased a few items from the MR Price at Haasendal Gables Store and obviously washed the items that was bought. Then on Monday, 26th of September when I wanted to wear the dress i purchased i realised that there is a hole on the side of the dress. I was not able to return it to the store immediately but I went the Thursday, 29th of October @ around 5:30pm and was assisted by Zanele (Cashier) and the assistant store manager Lucinda Steph****. I explained to them that I do not have the receipt anymore as my son went on Holiday and took the slip with the bag of clothes. I only took my items out of the bag. Obviously my son did not know what he did with the slip when I asked him to send me a picture thereof. I also explained to Lucinda that I paid with my debit card but if they could please assist me and check on their system if they can retrieve my purchase. She told me NO they cant (with no smile on her face) but I can go and choose any item to same value as the dress. At this point Zanele checked the what the price of the dress is on the floor and told me to go ahead and choose my dress or take the same one. I did not want the same dress as the quality of the dress was not good and chose another one to the same value. As Zanele was busy processing my purchase she advised me that the dress is now on promotion and that need to pay in additional amount because I did not have a slip. I told that I am not going to pay the additional amount as I paid full price for the dress and ITS NOT MY FAULT that they are selling reject items. The assistant store manager then said to me that if I dont pay the additional amount then they cannot assist me, but she is trying to Paul( dont know who that is) to find out what he says. At this point there was already a long que and no one was attending to the client. Lucinda was very annoyed and agitated and rolled her eyes at me, which I find EXTREMELY unprofessional!!! She this I dont care attitude towards me and didnt even try her best to assist me. She then just told me that she cannot get hold of Paul and handed my REJECT item back to me. FIRSTLY.. could they not pick up that the dress is on promotion before they told me to go and take another item of the same value???? also why pay MR PRICE more for selling an inferior item???? I would really appreciate URGENT FEEDBACK regarding this matter!!!