Can't reach an actual person for me to change my debit order date!

I have been trying to contact MTN to change my debit order date for almost two weeks but the one machine takes me to the next and the next, do they even have a call centre? I have also been to a branch where they apologized and said that they have the same experience with head office and that they can try submit my request on their side however head office needs to make the change for it to be effective. I told them i am going to Hello peter and they didn't even flinch, they agreed it might be my best bet in reaching anyone! My debit order date is set for 2 days before payday which is just ridiculous. HOW DO I CHANGE MY DEBIT ORDER DATE IF I CAN'T SPEAK TO AN ACTUAL PERSON?????????? Do you actually have customer service agents or is everything automated? I find this ridiculous!