Bad service

So nedbank called me about the charges I complaint about, and was told these charges were for card purchases, the funny part is my old card was blocked on 07/03/2019 but still on the same blocked card there was another charge of R 8.60. Nedbank is trying to cover up the fact that they are *****ing my money. If you are saying the card ending with *****774 is the one used for these transactions then provide proof on where did I try to swipe and how is it possible that I swiped the card that was left at the bank after being blocked or is it the bank staff who used my card and **** that my card is blocked.