Double Charging at tills

Clicks need to increase their profits so they double charge you,I went to Clicks Rynfield to make a purchase and when I paid they said they made a mistake and cancelled the transaction although it came through on my bank card as paid ,when I queried it they it would be revered as it went through twice.Well it was never reversed and I paid double for my purchase,nice company and cashiers and management as I was told by management it would be reversed,so today they are going to feel the wrath of my intolerance of theft.