Navient deducted a private student loan payment from my credit union checking account without any authorization from me. I have contacted them several times over the past 2 months ( XXXX/XXXX/15, XXXX/XXXX/15, XXXX/XXXX/15, XXXX/XXXX/15 ), sent them copies of my bank statement via fax ( XXXX/XXXX/15 ) and email ( XXXX/XXXX/15 ), yet they fail to refund the {$23.00} insufficient funds fee I incurred as a result of their unauthorized bank debit.