Why do you promise monthly statements?

So today, i received an sms and an email telling me that my services will be discontinued because my deduction was unsuccessful. I found this strange because this fee is supposed to be prorated and i was supposed to have received a statement from you telling me how much i need to pay. To my surprise, my online customer portal, recent statement and the sms you sent states my due amount is R0.00 and that's the deduction that you sent to my bank. So naturally i call "billing" to find out what the story is. I found out that i have to resubmit the deduction for R0.00 and my prorata will be charged. I know i have to pay the prorata, but what happened to my statement? I know my monthly fee is static, but what happened to my statement? The answer i got was that the portal will generate a statement once my payment goes through...Now here's a question: WHAT IF FOR SOME REASON THERE WAS A MULFUNCTION RESULTING IN MY FEES BEING 10X WHAT ITS SUPPOSED TO BE? DO I LET THAT GET DEDUCTED FIRST AND THEN WAIT FOR THE STATEMENT AFTER THE FACT TO QUERY WHY I WAS CHARGED 10X? Your system is flawed, why did i have to contact "billing" to learn what my prorata is? You singlehandedly nullified why statements exist, the same statements you promise to send me. 2 months into our relationship and this is what i get. To say we got off on the wrong foot is an understatement. And, the lady in billing needs to start listening to customers instead of interrupting mid conversation and speaking in a derogatory attitude because "She's been doing this for many years". frankly i don't care how long she's been there. I'm a paying customer and deserve to be treated as such. Don't bother contacting me to "Remedy the situation" from now on the payments will go off as agreed and i don't expect anymore issues. You need to look into the poor service for the people that will come after me.