Bad customer service

On the 14th June I have done a purchase at Westpack and the cashier swiped my card twice with the excuse that the paypoint freezed. The transaction went of 2 times from my bank account. Its been 2 months and still there is no effort made to refund me. Did the cashier pocket the money because surely when they cash up at the end of the day they would have seen that her cash register were not balancing???? There is so much issues and I will make a point if it never to return. My advice to all their customers. Never ever let them swipe your card twice for any reason! You will never see that money again!