Take control of your debit system

I created a debit order with DStv first week of February so they can make monthly debit orders on my bank account to make things easy for me. I got a message that they'll debit on the 28th of February which I was ok with, I left funds in my account and kept checking my statements and it showed that I did pay and then only today the 4th of march I get an SMS from them telling me the debit order didn't go off and now I have to pay twice the amount! Now I'm asking myself how so coz I got the statement and I gave them emple time to debit and the consultant who was assisting me was ****y and told me to find out from my bank how and why it bounced. Now I have to pay fees which I didn't want in the first place. How does multichoice's debit order system work then and how is that my fault that the debit order didn't go off at the stipulated date? This is uncalled for really