****** by the bank

I'm so furious.On the 18 0f December I thought I lost my card at the restaurant and I immediately went to Nedbank Rustenburg In waterfall Mall to cancel and block it.Indeed I was told it was blocked and was given a new card.I was also assured that even if someone might try to use it, it won't work because a new card was issued.TO MY surprise on the 11 of January 2018 an amount of R 1,950 was used from my account.I was so o shocked. I Immediately went to Nedbank to enquire,and was told that my Old card was used to swipe at some fruit.I was so shocked.Since this card was blocked.No one at the branch has an explanation,instead I was just told to fill in some form and was told that the investigation will take 30 days.Im so angry because I was saving that money for transport.There I was so inconvenienced.No one could explain. IT'S NOT FAIR AT ALL.HOW CAN A BLOCKED CARD BE USED TO SWIPE.I NEED UNSWERS AND I NEED MY MONEY.