Blocked debit card still being used

On the 15th of April I lost my debit card and I contacted Nedbank to block it and received a new bank card fast forward 11 June I was getting some toll gate payment going of my account I contacted Nedbank I was told to contact the company that is taking the money because is not a debit order, I did not get any luck on the 20 June and 3rd July another tollgate amount was taken again and it shows tollgates in the Limpopo area to Pretoria, I manage to get Sanral details and when thy did their investigation they found out that my old card that I lost has been used by a taxi and the reason why the transaction still go is because Nedbank did not list the card on the hotlist or something so is Nedbank s fault according to them,, now when I call the call center for refund they just keep me on hold no one seems to know what to do about this situation, I don't know how to trust them with my money