double charge

On Tuesday I bought few items at jets by trade route mall. at the paying till the cashier firstly after scanning the items she told me that she takes cash only I asked why she never tell me before scanning the items she gave me the bad attitude and took my things to the other till point when she scanned and swipe my card at the card machine she said it was declined at the 1st swipe I told her that I got the sms saying the transaction went through she said no it ddnt go through and she swiped my debit card again and it went through again. I explained to her that the transaction went twice and I was double charged, she said the manager will call to reverse the one transaction and it will take 1 working day. yesterday got no response 17/02. today 18/2 went in to enquire by the jet store since I ddnt receive anythng but they gave me an attitude and still my money hasn't been returned to my account, when I explained it my last money they ddnt care at all. Please assist