Debit order date not changed

I've forwarded a mail on the 13th of March with no response - see below<br> <br> Good Morning,<br> <br> I've requested several times (since Dec 2014) for my d/o to be changed to the 7th of each month - it still deducts on the 15th as it did when I was with Nashua Mobile.<br> <br> One of the last reference numbers I got was: ***.<br> <br> Can you please investigate to see what the problem is that it does not change on your systems, I'm now getting frustrated by having to contact MTN each month for something as simple as changing a d/o not being done correctly - and trying to contact your Call Centre's take forever for someone to answer and still not being able to assist.<br> <br> I'm hoping that I'll receive feedback on my query.<br> <br> Regards,<br>