Debit order fee

I enquired on a fee charged on my account. I was informed that this amount is for the returned debit order. I would like the charges to be reversed as I was not informed of a fee charged on a returned debit order. If that was the case i would never have opted for the debit order. A fee is normally charged by the bank. Please check your system and you will see that i never had a returned debit order. Telkom has not been consistent with the dates that the debit orders have been going off my account. I changed to debit order because it was convenient and i continuously received smss from telkom asking me to change. so i changed. I was not informed of any fees,etc it was just changed. Please reverse the charges as i am not happy with this. I am espcially concerned about my credit rating being affected that is why i would have preferred the debit order going off on a set date and not between dates as telkom advised. Can a supervisor or manager please call me as I could not clearly understand the lady that called me last week. I still have an open dispute online of which i am still waiting on response. If i get no feedback i will terminate my telkom line. Invoice 511C***z