Unprocessed money

Yesterday at 15h24 I went to Mr Price in Menlyn, I swapped clothes for R445.96 with my Capitec savings account which was deducted in my account but to the cashier it said error, she then said that I should pay again and I told her no I can't because It was already deducted in my account, so now the lady goes to other tellers telling them that I refuse to understand that the money will be returned to me. They started making noise as if I was a fool, now my frustration was that they are not even giving me any proof. I told them that Okay, let's say the money doesn't come back how will you guys know that I had payed for clothes that I ddnt even receive and they said that I should bring my Capitec statement which raised my frustration because I dnt hv anything written from them as proof that Yes I did come to Mr Price and money was deducted in my account but It ddnt go through to them. The other cashier called head office and the head office personnel said that from her side it's still pending. Then I ended up losing my temper because now I have to go back home without any proof and rely on their words that they will remember me. They were so rude made me look that I was being unreasonable. Then they allowed me to take a picture were they took my personal details saying that they will follow up, mind due that the book is an exercise book and has no where, where it's written Mr Price. All I wanted was just a confirmation that Yes I payed and money was deducted in my account and I did not receive the clothes not to be labeled as adifficult customer.