swiping bank card twice

My wife and purchased from clicks on Wednesday 16th of september. The cashier rings the card twice. Stating the 1st declined and refused to give me a slip to show me it declinedi had notification that the transaction went of twice. The manager insists the same as the cashier it will reverse. Today is friday and the transaction has not reversed. The manager has an attitude and asks me to go back to the store to sort it out. That is ********. Terrible service and attitudes. I need clicks head office to act on this..