I have been charged $46.60 through my bank account by CSASSIST IV, 866-7213556 . This company or persons is unknown to me .Who or what is CSASSIST IV ?.

Account :- W. D. Titmarsh Bendigo Bank
Date Description Withdrawals
26-Jul-2009 2407 USD000000003719;
RETAIL PURCHASE;
CSASSIST IV, 866-7213556 $46.60