Money ****** out of my account

I got a sms for a transaction at 16H31 today on my Gold Cheque account for R2'000, that I did not do/authorize.<br> When I called the ***** line I get told that it is the collections department that did the EFT.<br> It is not possible for them to stop the transaction!!!<br> They put me through to the collections department, only to hear from a pre-recorded service that their office hours are till 16H30 in the afternoon.<br> There is no way for me to stop this transaction or find out more about what it is all about.<br> Their logo should read: How can we help us.