Rude dismissive supervisor

I made a layby sometime during end of February 2022 in Alberton New Redruth Ackermans (Woman), upon taking out the layby (28/04/22) before I made any payments I explained to the cashier that I had misplaced my receipt because I was using a rental at the point and it might have been lost in that car. The cashier said I can make payment and I then requested that they make me a copy of the receipt that came out of the layby (store copy) because mine was misplaced. The cashier (Nokuthula Mbatha) refused and called her supervisor (Nhlanhla) of which I explained that the clothes were not for me and I want to be able to exchange the clothes should they not fit. The cashier first said no I should come back to her and she will exchange should I want to, then the supervisor said there's no need for that as long as the clothes have tags I should be able to exchange anywhere (because I stay far and I can't go back to Alberton for an exchange). I even requested that they make me a copy of the original receipt and cut out the words "store copy" so I can give my sister to exchange the clothes if they don't fit, supervisor refused. On the 29/04/2022 when we went to Heidelberg mall to exchange one of the items that was small we were told that the price on the item has changed, I therefore had to drive to Alberton to go get the item exchanged as per the amount on the original receipt of the layby that the new redruth shop had. The supervisor was very rude and dismissive because I had already explained that I don't have a receipt and asked for a copy to be able to exchange to that value. She insisted that the store copy belongs to the store, of which is ridiculous because it is the same receipt as the one lost and proof of how much the item was on layby if anything that shop knows exactly what paid by the customer. She offered to exchange the item but i'd have to pay the difference of which is a ******* because she has a receipt of exactly how much the item was. This is not how customers are treated were we spend our own money freely, had the transaction been cash and only 1 receipt was available that was lost, it would make sense to exchange the item on the system price but another original copy is available why should I pay more? I am requesting that layby receipt to exchange the item at the value I paid for, or the store copy receipt to be sent to the nearest Ackermans shop I'll exchange the item there since its store property, none of your CRISP values were followed by your staff nor is there anything related to "Phadima" in their behavior. If your supervisor speaks like this to customers I can only imagine how she treats the other staff. I can not be forced to pay extra for an item that there is proof of the value being available to the shop, let's not **** each other.