DOUBLE DEBITS IN 1 MONTH

I TOOK OUT A LEGAL COVER WITH CLIENT?LE, OF WHICH I NOW REGRET. I TOLD THE CONSULTANT THAT I WANT THE DEBIT ORDER FOR THE PREMIUM TO BE ON THE LAST DAY OF THE LAST DAY OF THE MONTH, NOT EARLIER THAN THAT. TO MY SURPRISE A DEBIT ORDER WENT THROUGH ON THE 24TH OF NOVEMBER AND FORTUNATELY MY ACCOUNT HAD MONEY IN IT OR ELSE I WAS GONNA GET A R145 BANK CHARGE FOR REJECTED DEBIT ORDER. IF THAT WAS NOT ENOUGH ANOTHER DEBIT ORDER WENT THROUGH AGAIN WITH THE SAME AMOUNT ON THE 30TH OF NOVEMBER AGAIN, FOR WHAT ONLY GOD KNOWS BECAUSE THEY HAD DEBITED ALREADY. I CALLED THEIR CALL CENTER AND THE CONSULTANT KEPT SAYING SHE CANT HEAR ME. I ASKED HER TO CALL ME BACK THEN BUT SHE SAID SHE CANT DO THAT. I SENT E-MAILS TO THEIR CLIENT CARE AND THEY ARE NOT RESPONDING. I AM NOW THINKING OF CANCELING AND TAKING LEGAL ACTION AGAINST THEM BECAUSE I DID NOT AUTHORIZE FOR MY ACCOUNT TO DEBITED TWICE IN ONE MONTH. WILL NEVER RECOMMEND IT TO ANYONE. A FRIEND WARNED ME ABOUT THEM BUT I GAVE THEM THE BENEFIT OF THE DOUBT