Unfair Billing

I hold membership with AA and last month my account was in arrears fine. I requested assistance from AA knowing that we have a contractual relationship and I was never assisted because my account is in errears. The agent didnt even want to listen to me when i made it clear that they can collect all historical amounts due. Come debit date, the collect all the monies due even the historical amounts and I would like to know why would they even collect historical debt because I was never assisted when I needed their assistance. This can not be right. i would like a proper explanation as to why collect all the money due even when my call was cancelled right in my face! I feel this thing is a month to month thing becuase when you didnt make payment that month you dont get service.