TELKOM BILLING FRUSTRATION!!!

I have a problem with my billing account for this month, I received my invoice on Saturday 11 August 2018. I had a query and I called the contact centre this morning ( 13 August 2018) and I spoke to an agent and did not get any joy. I am actually very frustrated!!! I want this resolved before the debit is meant to go off this month end. She just referred my query to the "back office", which has a turnaround of 14 days. My frustration is that by that time the debit order would have gone off by then.. I need answers now. Answers your call centre agent is unable to respond to!!! The response she gave me was that it is because I had changed my debit order date ( a difference of 4 days).. a date I was forced to change because Telkom went into my account on a date we did not mutually agree to!!! How is possible that my bill is double just from a 4 day difference in the debit order date????