Ackerman's management

I asked for a refund on 15 Nov 2019,after the manager of Ackermans was very reluctant to do the refund she processed the refund by means of a card transaction. She processed my card as n credit account and not a cheque account and the money did not reflect in my account because it was wrongly processed. I the returned to the the same store to voice my concern which they then demanded a bank statement to prove that the money has not been refunded. I told them that a statement is confidential but I will show them because I need the money back. Yesterday,the 19th of November I presented my proof that I have not received my refund. The manager then told me the account number of the statement given and card number on the credit slip does not match,she does not understand that a card number and a account number are two different things,humiliating me in front of her staff and customers trying to make me look stupid and illiterate,but in fact she was the one in the wrong. I waited for an hour to get my money back. How must I provide bank statements when they owe me money??? Goods have been returned,hence they owe me. Now I must show my very private statement to someone that owes me. Worst of all,they leave my statement on the counter for the whole world to see,not very tactful,and I'm sure this is a breach of my human right to privacy. I will never support their company again,their management are distasteful,rude and doesn't have the knowledge required to be in that position.