Debit order early and Penallty fee charged

Good day i am writing this review in regard to the failed debit order and the debit order charge added to my account, firstly I WAS NOT NOTIFIED THAT A DEBIT ORDER FOR PAYMENT IS RUNNING FOR DECEMBER,as this is a new account my knowlege was 1st debit order 1st of January. 2ndly i went to the Vodashop in Nigel Angelo Mall on the 9th of December to confirm if any payment was due, the lady at the desk advised that the system says a ZERO BALANCE ! If your system indicated that i had owed an amount of R 175 i would of payed it ! There and then ! I disagree with all this, as i clearly stated that debits go off on the 1st of each month, NO ONE ADVISED ME THAT THERE WAS A DEBIT ORDER FOR R175 that was due for early December ! I can not pay pennalties of R 100 if i know i was under the impression that my 1st debit is due on the 1st, i did go to the Vodacom shop and yoyr systems showed a R 0.00 balance owing and i made sure with the lady that assisted me that i do not owe anything.