DOUBLE DEBITED MY ACCOUNT

I purchased a garment at Cotton On on Friday 15/05/2015. It was a sale item and when I got to the till the cashier did not know it was on sale and gave me a different price. I then had to explain that its on sale and had to wait whilst other assistants had to go and prove that it was marked down. They then found that it was marked down as i said and did not care to apologize. I was offended and embarrased as everyone stared at me and i found this to be bad service as it is not the first time i shop at this particular store and the sales assistants are not aware of the prices. I then made payment and this was deducted from my account, i know this because i received an sms right after. The cashier advised that this was not successfull on their end and they would need to debit the amount again. I showed them the sms yet they insisted that this need to be debited again. I then asked for a manager and a lady named Nawaal came and gave me BAD ATTITUDE! I showed her the sms as well and she abruptly said that there is no way i am leaving this store with the garment. The store manager then came and assured me that my money would be reversed in 24hours. It is now 5 days and still i await !!