Why are you debiting more than we agreed on?

In June/ May I signed an agreement with Chubb for R388 per month, To my surprise the first debit came out & it was arose and R667 when I called the call centre to ask they told me its admin fees,etc & that next month it will be fine. Again the following month it was around R667... I called the call centre to find out and was told its the annual fee etc and was promised that the 3rd month it will be fine. This morning I received a notification from my bank and guess what they took R502. This is not the money we agreed on! I just called the call centre and they are claiming that I have dceeded my responses! I am disputing that because in Sept I received a text advising me that if I have further responses in the month of September I will be charged. I did not understand the text so I called the call centre few days later & they explained to me that because I have reached my limit if I have further responses in Sept after I have received the text i will be charged more, I then asked the advisor to check for me if I have incurred extra charges and she said no & promised it will stay that way if I do not have responses in sept, who CH I did not after they have warned me with the text on the 5th Sept. Then how come is Chubb now saying I have exceeded when I did not have further responses in Sept after the warning text? This is **************** I want my extra R114 you took! Because I even called your call centre & was promised that I did not incurre extra charges and I made sure I did not have further responses. Area manager or operations manager or anyone higher at Chubb please call me because I refuse to be ******