Double transactions on my account

Good Day

I bought items at Mr Price Mossel Bay on the 27th, used my bank card to purchase and it was deducted twice from my account and was told it will reverse on the same day but it did not. On the 28th i was told to bring my bank statement which i then bought the bank statment and they saw the transaction but still no response when i go to the shop i do not get the required feedbank but what is my main concern is the double transaction was dected in my account