Immediately dispute the charges thru your bank and close the account to prevent future fraudulent charges. Follow up with a written dispute of the fraudulent charge sent to the dispute address indicated on your statement.
Cancel all of your debit and check cards, as they are not safe. Never provide your checking account number to make a payment of any kind. Use checks only to pay companies you know and trust, such as rent, mortgage, utilities, credit card payments, etc. Use only credit cards for all retail or online purchases, since they are easier to dispute and cancel.
