Debiting an Amount already Paid

Once again i have a complaint on my account, an amount of R 133.91 was debited on my account on the 10th of May for apparant arrears as from the 27th of April, the accounts department just informed me that I made an Automated arrangement on the 27th of April from an e mail i received giving me 2 options to pay.

As i previously explained very well and clearly, when this contract was finalised I was not completely aware that a pro rata amount 2as to be debited from my account for R 133.91, within 48 hours, which infact never happned in that time frame, the debit order went off between the 26th and 27th of April, causing the debit order to return unpaid ! I disputed this and the penalty fee, and after explanation after explanation the penalty fee was credited to my account.

On the 2nd of May an amount of R 355 was debited successfully, the accounts department did not notice ANY arrangement that was made between the 27th of April and the 2nd of May when they actually investigated my account when i disputed the return debit order with the penalty fee of R 100.88 and went forward in debiting my account with R 355.66 which WAS the correct amount including the R 133. 91 that was still owing.

My point is, they did NOT pick up or notice that Automated arrangement inbetween the debit dates, and the whole amount of R 355.66 was infact debited on the 2nd of May, i was NOT aware that your system accepted an arrangement to debit my account on the 10th of May for R 133.91 which i would not have arranged such an awkward date to debit, i was in fact trying to arrange to pay the R 133.91 on the next debit date which was to be the 2nd of May as far as i was concerned.

But the debit order went of on the 2nd of May for the whole amount that was owing which was R 355.66 leaving my account in good standing, now AGAIN MY ACCOUNT SHOWS I AM OWING R 100.88 for a return debit order that went off on the 10th of May, for a PENALTY FEE, because the debit order came back unpaid !!

Please assist me in this regard as i am NOT willing to pay this, if my account was already paid in full on the 2nd of May ! Your systems and accounts department should of noticed that my account was up to date, and they should of noticed that when my account was being investigated that my next debit date was on the 2nd of May for the whole total amount that was owing, funny enough, my account stayed in arrears up until the 2nd of May when the whole amount was debited, and still your accounts and your system goes and debits my account on the 10th of May for R 133.91 ????

I do not accept this and i can not be held responsible to pay Penalty fees on return debit orders if my account was already in good standing and up to date on the 2nd of May