Shocking service from the Billing Department

Took out a month-to-month plan and I was very impressed that the whole order and delivery was done within an hour, I was so impressed that I tagged the CEO on LinkedIn. I spoke too soon because what followed after was such a terrible service from customer service and the billing team. The website allowed me to choose my preferred billing date, I guess to get more customers but as soon as I signed up, their billing department changed my debit order from the last day of the month to the 15th. It took me a few calls and emails to get a very confusing explanation with 3 dates. I was apparently changed from the 15th to the 4th and something about cut-off date being the 25th. I have read that email a thousand times and still cannot understand it.

I then got an sms reminder about the debit order that’s apparently due on the 15th when I was told it had been changed to the 4th. Normal companies pay their people on the 15th, 20th, 25th -31st. Why does MTN only accommodate those being paid on the 15th? I get paid end of the month, why can’t I have a debit order for the end of the month. Make it make sense.