Account debited twice as cashiers do not know how to use the speed point

I recently visited the Ackermans at Cornubia Mall and upon paying for my purchases I was told that the transaction had not gone through as the speed point switched off. I was then asked to swipe my card again despite showing the manager that the transaction has gone off the account she insisted that I could not leave the store until they get a print out from their side and if the account was debited twice that I should come to them with my bank statement

Further I contacted Ackermans customer services and was promised to receive a reference number via email and that a third party company would call me the very next day however this has not happened

I am now R699 out of pocket-I will he held liable to pay the installment on my credit card and I have paid double for a transaction based on the cashiers lack of knowledge and unwillingness of the store manager to take into account what was being said

Further the store manager had the audacity to tell me that I must come back with my bank statement.

I demand a call from Ackermans as i want my money that is owing to me and Ackermans should reimburse me for all the airtime that I have wasted trying to contact the customer services department who all of a sudden cannot find my complaint