Amount taken off my bank account 3 times with no refund

I made a purchase at the George Dischem. The card machine took very long that day and she tried 3 times to the card through. On Monday morning I realized that the amount had gone off 3 times. After a week of calling and emailing I still have no feedback and no monies have been refunded. I am out of pocket in December of R1100 . I do not know what do to anymore but seek legal action as I now had to borrow money for my debit orders and every day use