DEBIT ORDER ISSUE

I am so ****ed with NETSTAR, I advised them to debit me on the 20th monthly as normal, suddenly they decided to debit me on Friday the 19th and I had no money because I get paid only on the 20th and they know my debit order always runs on the 20th. This time debit order failed because they debited on a wrong date and my bank charged me R105 for an unpaid debit order. I called them and informed them I want them to re run a debit order and take the premium since they went in on a wrong date but still they did not run a debit order. The lady from the debit order department I spoke to now was so rude wouldn't listen to me her surname is Naaidoo, no one is sure of what to do every time I call they send me from pillar to post. I spoke to Amanda from client service she did not help me or even reply to my email as she instructed me to send her an email and I find that very unprofessional, I spoke to Xolani at Finance he also did not assist instead transferred me to this rude lady at debit order. I want you to debit what I owe you and refund the unpaid fee that I was charged for your wrong doing. I think also you need to train your staff customer service not this bull**** I'm getting