MTN debit order blunder

I received sms messaged stating that my account has not been paid (via debit order) and that my services will be suspended. I subsequently made a payment via card on the app, to NOT have my services suspended, only to see that the debit order was also presented, resulting in my account being paid double. I've tried calling and even visited a branch for assistance but they just say we can't help. The worst part is that they don't even apologise for the inconvenience! This is extremely bad service from such a large corporate! I now have to scramble to make provision for other debit orders which will now not be catered for