XXXX/Navient is unable to service my loan and apply my payments correctly. 

It has been going on for XXXX years, but since the last XXXX months it has become predatory. XXXX months ago I called into to change from a XXXX repayment program to a program where I would pay the same amount for the life of the loan. They said my new payment for the duration of the loan would be a little over {$700.00}. XXXX months later, they called me back and said they " forgot '' some of my loans and my new payment would be {$890.00} per month. I would not have changed to the fix payment program had I know it was going to increase so much. After they guaranteed me over the phone that the $ XXXX amount was what I would pay for the life of the loan, I then decided to re-assess my budget and purchase a home with my wife. Then, shortly after purchasing a home, they called and said they " forgot '' about {$190.00} in charges. 

Since then, I have to call in every month to make my payment. Every month I am told I owe a different amount, ranging from {$100.00} to over {$1200.00}. Every month I am told that my previous month 's payment was applied incorrectly by the customer service associated I spoke to and that the current month 's payment would be applied correctly. My payment has not been applied correctly in over XXXX months and XXXX XXXX/Navient refuse to research into the issue OR call me back regarding the issue.