Very Bad business Administration

I have been a customer to Vodacom for many years and I have just learnt Vodacom have a poor CRM. I have two contracts that I have well-managed ever since, not even the smallest dent on my record. Since last year November, I decided to pay ALL my monthly debits via internet banking for security reasons and each Vodacom statement reflects this option should one wish to settle their accounts that way. To my surprise, on the 2nd of this month I receive an sms informing me that I owe R618( my account is R518 and I paid R520 on Monday Dec 28th and R518 the previous month)..after calling 111, I get told ONY THEN that the extra R100 each month is for the unpaid debit, even though they have received the money AND THE BANK ACCOUNT IN QUESTION WAS CLOSED, they will continue submitting the debit with the bank until I RECEIVE A DEBIT CANCELLATION FORM THAT THEY WIIL SEND, I SHALL FILL IT IN AND FAX IT BACK TO THEM AND ONLY THEN MY DEBIT WILL BE CANCELLED! I mean really?<br> 1. When I took the contract the whole process was over the phone, no form was filled<br> 2. They did not bother to find out WHY the debit bounced, THEY JUST CHARGE R100 and will continue.<br> Where is transparency and CRM?.