Complaint- Security ***** on my account and unsatisfactory action

Good day, I have a complaint, Nedbank needs to look into their ***** department turnaround time. I received an sms saying " Warning, card transaction... outside South Africa" I called immediately, I need to know how the transaction went through, where and when. I will be charged for a new card, how would I know that this will not happen again with my mastercard?

I have banked with Nedbank for a long time and this is the first time. 1. Why did Nedbank allow such a transaction? 2. Why is the investigation/ turnaround time 3 weeks? 3. I am expecting money my; salary and an investment in the next coming days and I am worried about the safety of my account.

Please can someone prioritize, I am extremely hurt, worried and unsettled as the call center agent Mercia did not give me much reassurance. Please can someone urgently attend to this.

It is ridiculous that a bank this big does not prioritize security of our accounts.