Unautorised deduction of money from bank account

I already had a issue with Avis, refer to my complaint of the 09 September 2015.<br> The issue was resolved, thank you for that, but since then Avis has taken money of the credit card TWICE, both times it was R265, apparently for a fine. How can Avis just take of money randomly as they please? In other words, even though the contract has long time ended, they have access to your bank account for as long as they please and for any amount? This is unacceptable! If it was indeed for speeding fines, I want a copy of these mailed to me ASAP! The call centre just refer you back to the branch, and when you phone the branch you get connected automatically with the call centre. As was previously the issue, the car was given back to Avis, but they never change it on their system, and charged us for the next person that was renting the car, for all I know I am now paying his speeding fines too! Totally ridiculous and unacceptable that Avis still has access to the bank account and can just deduct money as they please