Double payment for one transaction

20 August 2015 I asked Jet Carlton Centre to use my Edgards account to pay for the items, if the available amount is not enough, I will pay the balance from my debit card. Cashier, Oupa did not follow the instructions and debited the full amount from my bank account which I'm not happy with. He spoke to a lady cashier in another language and referred me to her. She confirmed I have enough available and I requested to to submit the full amount on my Edgards account. I then asked her about the debit card transaction. She could not assist me to ensure I'm refunded the same day. The manager Beauty was called in to sort out the issue. Beauty did not want to refund me nor listen to the situation. She phoned someone by providing gentleman with the wrong information which led to no solution. She called Oupa to the office trying to convince him not to admit to the incorrect transaction he did instead of finding a solution. I left the store paying double for the items i purchased. I lodged a complaint online to Jet on two occasions, no response. I called the contact centre just to be cut off. Besides the bad service and attitude of the manager, I need my bank account to be refunded.