double debits AGAIN

FOR THE SECOND TIME THIS YEAR CELL C HAS DOUBLE DEBITED ME. WHEN I CALL THEIR CUSTOMER SERVICE DEPARTMENT THEY JUST DENY THE DEBIT ORDERS AND INSIST THAT I MUST SEND THEM MY BANK STATEMENT. FURTHERMORE I ASKED TO SPEAK TO A TEAM MANAGER, HER NAME KWANELE- SO RUDE AND VERY UNHELPFUL. I HAVE REVERSED THE 2ND DEBIT ORDER WITH MY BANK- WHICH IS NOW COSTING ME R200. IM SO SICK AND TIRED OF CELL C AND THE WAY THEY THINK THEY CAN JUST GO INTO MY BANK ACCOUNT WHENEVER THEY FEEL LIKE IT. I HAVE BLOCKED THEM FROM MY ACCOUNT AND WILL RATHER PAY MANUALLY EVERY MONTH.