Wrong Debit order

I wish to express my dissatisfaction I'm receiving from MTN. On the 7th of September I sent an email to request for a change of my debit order from the 25th of every month to the 1st of every month effective from the 1st of October 2015 (as per emails below). MTN went ahead and debited my account on the 25th of September even though I communicated well on time for the date to be changed, I then took the onus upon myself to remedy the returned debited on the 2nd October. I received my statement around the 23rd of October and called the contact centre and also emailed Nosipho Bolani (whom all my proof of payments have been sent to) to confirm which amount will be debited from my account as the R279 I paid on the 2nd of October did not show on the statement and I was informed that only R279 will be debited on the 2nd of November and to my surprise double that amount has been debited.<br> <br> Can I please have this rectified, as I really can't continue with this *********** and poor service you're offering.