R18000.00 **********ly taken from Nedbank account

I am a Nedbank business account holder, on the 19th October 2018 I had 3 seperate withdrawals/purchases go off on my account while I inside the branch trying to report that my atm card had been retained by the atm while trying to withdraw a few minutes earlier.The total money withdrawn and swiped for purchases amounts to R18000.00. I sought assistance to have these transactions blocked/reversed but this was not possible as the branch was offline.I clearly did not make these purchases and withdrawals as I was in the branch at the time of these transactions reporting that my card has been retained by the atm.I have since been to the branch on two separate occasions but I have not received a call to update me on the status of the query/investigation and whether or not this is being looked into by the ***** division for the money **********ly taken from my account to be reimbursed.