Traffic fines without documents

we rented a car from avis amsterdam in march 2015, we payed the amount at the end, and in july (after 4 months!!!!!) our credit card was charged again from avis with the amount of 200 euros, without any notification !!!!! I spoke several times with the customer care department and i also made a written request in order to send me the documentation or the proof of those trafic fines, but still no answer. Recently a called again but they wont answer me. We just want to know what the fines are for , it is not possible that avis to charge our credit card without any justification/ proof of the fines!!!! They could have send us via email the notification with the tickets!