R4300 data charges

I have been a customer with Autopage for a lonnnng time.<br> My account has been in excess of R60 000 over the last year.<br> A couple of months ago I changed to an Unlimited Package costing around R2500 per month.<br> yesterday, Autopage debited my bank account with R7500.<br> no one can provide answers as to why. (not that I care about the answers as its obviously incorrect to debit R7500)<br> due to this Debit, some of my debit orders \bounced"";15/03/02 12:05;NULL;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ***;25266;883628;22;2;0;0;0;0;2;NULL;NULL;NULL;15/03/02 11:50;15/03/02 9:53;Impossible to get banking details changed;***;enquiries at GEMS;***;Today, the 02/03/2015 I get yet ANOTHER SMS from GEMS. This time, your SMS reads as follows: \Please be advised that we require a certified identity document;you are asking for documents that have already been provided and now I am losing my temper with your inadequacy. Go and check the documents nicely and you will notice that all the necessary documents to CHANGE my bank account have been provided.<br> You are being pathetic is your requests and I am becoming annoyed.<br> 1. Page 3 of the documents entitled \""Certified Copies\"" contains a certified copy of my ID. <br> 2. I am a TENANT. I LEASE a property from the owner"