Double debit

on the 08 January 2016 at 21:03, we went to the Chicken Licken Drive thru in Rivonia, Sandton<br> we ordered for the amount of R109.70. we gave our debit card (Ned bank savings card) the cashier did the purchase, but due to no network or the approval taking to long the transaction failed. she said that it did not go thru. so we gave her another card (FNB CHQ CARD) she did the purchase again and this time it was fast and the transaction got approved. she said that the other transaction didn't go thru so it wouldn't go off our account. but she didn't give us the slip that it said failed.<br> We have both sms from the banks to say that both the times the transaction went off.<br> When i called the branch they said that they couldn't help me to get the refund and put the phone down on me.<br> this is not acceptable. i would expect the refund as the amounts went off both accounts.