A payment {$2600.00} was sent to XXXX XXXX ( serviced by Navient ) and was posted to the wrong student account. Since Navient found where it was incorrectly posted, Navient has made XXXX manual entries trying to post the {$2600.00} payment between XXXX of my private loans and backdate it to XXXX/XXXX/14 ( the date it was posted to the wrong student account ). The payment still has not been posted correctly after six months and XXXX entries. After numerous calls and countless hours dealing with Navient 's Customer Service ( you ca n't speak to anyone who actually posts your payments or knows how it works ), I finally found someone who would request my account be audited by Navient 's " Finance Dept '' regarding my payments and the interest paid in 2014. I finally received XXXX separate letters from Navient for each audit ( payments and interest ). The XXXX letter said the interest I paid in 2014 was {$53.00} ( I made XXXX payments of {$210.00} each in 2014, plus the additional {$2600.00} payment ). The XXXX letter showed all of the " payments '' in 2014 with a breakdown of how much was applied to Principal and how much to Interest. When you add up the Interest Navient showed, it totals {$3200.00}. Please explain to me how XXXX letter says interest paid in 2014 is {$53.00} and the other letter shows {$3200.00}. The letters were dated XXXX day apart. Neither letter is correct. Navient has made so many errors I do n't know if anyone can fix it, but certainly no one at Navient is capable of doing it. I am so frustrated with not being able to talk to anyone at Navient who understands Accounting and can see the errors made in the XXXX entries they have made. I am hopeful CFPB can research and reconcile my account and ensure Navient processes the correct entries to resolve this.