RIDICULOUS BILLING

So being a single parent, I decided to look at my banking cost and try to change to something more feasible, This was when I had a normal debit savings account with Absa, upon adding up the charges it was quite costly and decided to change over to a cheque account thinking there were added benefits. I was under the impression as it was explained to me that I would be charged R98.00 per month and that was it. Well what a surprise I got today! R500.00 was deposited into my account and over R300.00 was deducted! This is beyond ridiculous! The R98.00 was not suppose to go off today at all!!!! I agreed for it to be deducted on the 25th of each month! When I called I was given some lame excuse about penalty fees, admin charges ect. When I told the lady but this was not explained to me nor did I agree to this she says oh I will put you through to billing and the more I am saying I did not agree to this the more it is told to me oh its this charges and that charges! I AM SICK TO MY STOMACH AND THIS IS BEYOND RIDICULOUS AND SOMETHING I NEVER AGREED TO! I WILL BE CHANGING BANKS! This is very bad service as these charges were not explained to me prior to changing accounts!