TELKOM *****S UP, THEN *****S MY MONEY WITH A 2ND DEBIT ORDER

I woke up to a debit order of R1023 to my account this morning, the 16th of the month, surprised as I was sure my debit order had already gone through for the month on the 1st. Called Telkom and was told that my invoice amount for last month was R984 and my debit order was taken at only R900(being my fixed contract amount, excluding variable), and that I had been handed over for the R84. The collection department do not call you to ask you to pay the R84 arrears amount that they did not collect properly, they do not email, sms or notify you in any way, shape or form to ask you to make payment as they could not do it properly to begin with, NO!!!!, instead they decided to put through another debit order, and while they were at it, sommer take next months debit order early!!! to which they were NOT entitled to as yet. I have an impeccable credit history, zero red flags and have never missed a payment in my life. So you can imagine the horror when the call agent, first accused me of lying about a debit order, then accused me of not having the sufficient funds on my account to take the full payment, as if a debit order would ever take partial funds if all was not there to take) and then told me that I need to check my statement each month to confirm they are doing their job correctly. Then proceeded to tell me that there was nothing she could do. WHY WAS I NOT CONTACTED TO MAKE THE R84 PAYMENT DIRECTLY VIA EFT? WHY AM I HANDED OVER WITHOUT EVEN A PHONE CALL WHEN I AM A GOOD PAYER? WHY HAVE THE CHEEK TO, AFTER MESSING UP WITH THE DEBIT ORDER IN THE FIRST PLACE, TO THINK THAT YOU WILL TAKE AN ADVANCED PAYMENT WHILE YOU ARE AT IT? I signed a contract to a specified date for the debit order ONCE A MONTH. I did not sign a contract allowing you to take AS YOU PLEASE WHEN YOU PLEASE! As far as I am concerned this is incompetence and theft!!!! I have since arranged with my bank to reverse your debit order and immediately made an EFT payment to Telkom to value of R90. Which I would have been happy to do in the first place if you'd had the decency to contact me regarding this matter to begin with! I will make payment on what I owe, but I will not be making any payment for the future month when you are not yet entitled to it!!! HOW MUCH MONEY ARE YOU MAKING ON INTEREST ON YOUR CLIENTS MONEY THAT IS SITTING IN YOUR BANK ACCOUNT THAT YOU ARE NOT ENTITLED TO AND THAT YOU TAKE EARLY WITHOUT THEIR CONSENT????