***** case

My card was ******, and I immediately contacted FNB, after I had blocked the card on the FNB app. I went to the branch and the card was replaced a week later. Now here is the problem, despite the card being replaced transactions are still going off on the account using the ****** card.

The matter was reported to their ***** department on the 10th June and a case was opened, I have the case number as I type this, however transactions are still going off on the account and I received an email this morning that the account is overdrawn with R5968.4. How is this even possible? How can a blocked card which was replaced still be used even after a case was logged? Up to this day I've not received any feedback. What should be the next step?

My case number is ***.