Not cancelling debit orders

During February I went to FNB Mall@Reds and SIGNED AND INSTRUCTION TO CANCEL A DEBIT ORDER!!! <br> <br> I am separated from my husband, we are going through a divorce and he needs to pay his own Momentum policy. <br> <br> Despite my instructions WHICH I SIGNED FOR AND WAS CONFIRMED THE DEBIT ORDER WAS NOT STOPPED!!!!!<br> <br> HOW CAN YOU LET ME PAY OTHER PEOPLE'S ACCOUNTS AFTER BEING INSTRUCTED NOT TO DO SO!!! <br> <br>