Dishonesty at The Raj

I paid with my card on 21 Dec at the Blue Hills store. At first the transaction failed. Cashier tried again this time was successful. On Saturday 22nd Dec I received notification that the transaction did go off twice confirmed this when I checked my bank account. I've been to the store twice for a refund but they weren't very helpful kept insisting that there was only 1 transaction on closing up that day. They promised to check and come back to me from headoffice on Monday 31 Dec I have not yet heard from them. Didn't receive not one courtesy call. Next step national consumer commission...